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Published by MSAdvance on June 10, 2026
Categories
  • Office.eu migration
Tags
  • business privacy
  • cloud migration
  • digital sovereignty
  • email migration
  • EU Drive
  • EU Email
  • EU Talk
  • European alternative to Microsoft 365
  • European productivity suite
  • Exchange Online
  • file migration
  • Microsoft 365
  • Microsoft 365 to Office EU
  • Microsoft 365 to Office.eu migration
  • Microsoft Teams
  • migrate Exchange Online to EU Email
  • migrate Microsoft 365 to Office.eu
  • migrate Office 365 to Office.eu
  • migrate OneDrive to EU Drive
  • migrate SharePoint to Office.eu
  • migrate Teams to Office.eu
  • Office 365
  • Office.eu
  • Office.eu DNS
  • Office.eu MX
  • OneDrive
  • SharePoint
  • SPF DKIM DMARC
  • Word Excel PowerPoint compatibility

Migrate Microsoft 365 to Office.eu: complete guide to move email, files and collaboration without losing control

Do you want MSAdvance to help you migrate Microsoft 365 to Office.eu with a secure and realistic plan?

Migrating from Microsoft 365 to Office.eu is not just about “copying emails and files”. It is a change of work platform: email, calendars, contacts, documents, shared files, meetings, permissions, domain, DNS, security and user habits.

At MSAdvance, we support Microsoft 365 to Office.eu migration with a clear methodology: assessment, wave-based planning, testing with real users, domain preparation, data migration, validation and post-cutover support. The goal is for the company to gain control and digital sovereignty without the change becoming a problem for the team.

  • Microsoft 365 inventory: Exchange Online, OneDrive, SharePoint, Teams, domains, DNS, security and users.
  • Phased Office.eu migration plan: email, calendars, contacts, files and adoption.
  • Document compatibility validation: Word, Excel, PowerPoint, templates, macros, formats and workflows.
  • Go-live support: DNS cutover, email review, training and incident resolution.

Contact our team View MSAdvance services

A Microsoft 365 to Office.eu migration is the process of moving email, calendars, contacts, files and part of day-to-day collaboration from Microsoft 365 to Office.eu, a European productivity suite with email, storage, documents, spreadsheets, presentations, calendar and calls. The safest way to do it is with a phased plan: Microsoft 365 inventory, pilot with real users, email and data migration, controlled domain/DNS cutover, document validation and user support.

Quick summary: migrate Microsoft 365 to Office.eu in 10 points

  1. Common reason: reduce dependence on large non-European platforms, look for a European suite, simplify tools or strengthen digital sovereignty.
  2. What can be moved: email, folders, attachments, contacts, calendars and files, provided they are accessible in Microsoft 365 and within the available interfaces.
  3. What requires analysis: Teams, complex SharePoint, Power Platform, Intune, Purview, automations, advanced macros, corporate templates and Microsoft-integrated workflows.
  4. Office.eu is not a Microsoft 365 clone: it is a European alternative with a different approach. Document and process compatibility must be validated before the final change.
  5. Email is the visible part: mailboxes, aliases, lists, calendars, contacts, MX, SPF, DKIM and DMARC records must be prepared.
  6. Files are the sensitive part: OneDrive and SharePoint do not always move as an exact copy of permissions, links and versions; it is best to organise before migrating.
  7. Teams needs a strategy: files can be treated as data, but chats, channels, recordings and apps do not move equivalently to EU Talk without redesign.
  8. The pilot is mandatory: you need to test with real users, real documents and real business cases before moving the whole company.
  9. Communication matters: if users do not know where their emails, files and meetings are, the project will be perceived as a failure even if it is technically sound.
  10. MSAdvance can manage the process: assessment, migration, DNS, validation, support and training to reduce risk and accelerate adoption.

Table of contents — Microsoft 365 to Office.eu migration

  1. Quick summary: migrate Microsoft 365 to Office.eu in 10 points
  2. When does it make sense to migrate Microsoft 365 to Office.eu?
  3. Introduction: what changes when moving from Microsoft 365 to Office.eu
  4. 1. What Office.eu is and what it includes
  5. 2. What can be migrated from Microsoft 365 to Office.eu
  6. 3. Recommended migration methodology
  7. 4. Assessment: Microsoft 365 inventory before migrating
  8. 5. Pilot: test Office.eu with real users and documents
  9. 6. Migrate Exchange Online to EU Email
  10. 7. Migrate calendars and contacts
  11. 8. Migrate OneDrive and SharePoint to EU Drive
  12. 9. Document compatibility: Word, Excel and PowerPoint
  13. 10. What to do with Microsoft Teams when migrating to Office.eu
  14. 11. Power Platform, Intune and other Microsoft dependencies
  15. 12. Domain and DNS: MX, SPF, DKIM and DMARC
  16. 13. Security, privacy and compliance
  17. 14. Microsoft 365 vs Office.eu: an honest comparison
  18. 15. Operational checklists: before, during and after
  19. 16. Common mistakes when migrating Microsoft 365 to Office.eu
  20. 17. KPIs and success criteria
  21. 18. Frequently asked questions
  22. 19. Official resources and useful links
  23. 20. Conclusion and next steps

When does it make sense to migrate Microsoft 365 to Office.eu?

The decision to migrate Microsoft 365 to Office.eu should not be made only because of price or trends. It is a strategic decision about where information lives, what level of control the organisation wants to have and what work experience it needs.

Common scenarios

  • Digital sovereignty: companies that want a European suite, with data hosted in Europe and less dependence on non-European platforms.
  • Reducing complexity: organisations that use Microsoft 365 only for email, files and basic documents, but do not take advantage of advanced features.
  • Simplifying collaboration: teams that want a lighter experience for email, files, documents, calendar and calls.
  • Avoiding vendor lock-in: companies looking for more openness, data exportability and a platform based on open standards.
  • Cost review: organisations that want to rethink licences, storage, collaboration services and support.
  • Internal or sector policy: entities with specific requirements for data residency, privacy or technology transparency.

When you should think twice

Office.eu can be an interesting alternative for many teams, but it will not always be the best option if the company depends heavily on:

  • Microsoft Teams with channels, apps, recordings, webinars, telephony or complex integrations.
  • Advanced Excel with macros, complex models, Power Query, Power Pivot or specific add-ins.
  • Power Platform (Power Apps, Power Automate, Power BI) as the engine for internal processes.
  • Intune, Entra ID, Defender, Purview or advanced security and compliance policies.
  • Third-party integrations that only work with Microsoft Graph, Exchange Online or SharePoint.
Practical rule:

If your company mainly uses Microsoft 365 for email, calendars, documents, files and simple meetings, Office.eu can be a very good fit. If Microsoft 365 is the core of security, automation, identity, BI and document governance, the migration requires deeper analysis and possibly a hybrid or phased model.

Introduction: what changes when moving from Microsoft 365 to Office.eu

Migrating from Microsoft 365 to Office.eu means changing ecosystem. In Microsoft 365, email, files, Teams, identity, security, devices and automations are highly integrated. In Office.eu, the proposition focuses on a European suite with essential tools for email, files, documents, calendar and communication.

That is why the project must be approached realistically: it is not about “cloning Microsoft 365”, but about moving what is necessary, organising what can be organised and adapting processes to the new platform. A good migration avoids two extremes: promising that everything will be identical or moving data without preparing users.

This guide is designed for companies that want to assess or execute a Microsoft 365 to Office.eu migration with clear criteria. We will cover what can be moved, what must be reviewed beforehand, how to handle email and files, what to do with Teams, how to prepare the domain and how to measure whether the change has worked.

1. What Office.eu is and what it includes

In practice: Office.eu is a European productivity suite that brings together email, files, documents, spreadsheets, presentations, calendar and calls in a single environment.

Office.eu presents itself as a European alternative to Microsoft 365 and Google Workspace. Its value proposition is based on an integrated work experience with several components:

Main components of Office.eu
ComponentApproximate equivalent in Microsoft 365Typical use
EU EmailExchange Online / OutlookBusiness email, mailboxes, contacts and daily communication.
EU CalendarOutlook CalendarCalendars, appointments, meetings and invitations.
EU DriveOneDrive / SharePointStorage, synchronisation, shared folders and file collaboration.
EU DocsWord / Word OnlineText documents, collaborative editing and compatibility with common formats.
EU SpreadsheetExcel / Excel OnlineSpreadsheets, reports and collaboration on .xlsx files.
EU PresentationPowerPoint / PowerPoint OnlinePresentations, sales materials, training and meetings.
EU TalkTeams / calls and meetingsVideo calls, communication and lightweight collaboration within the workspace.

One important difference: Office.eu should not be evaluated as an exact copy of Microsoft 365. It is an alternative with a different approach: more focused on a European suite, data control, clear collaboration and less dependence on a closed ecosystem.

2. What can be migrated from Microsoft 365 to Office.eu

In practice: you migrate data and working habits, not just “loose files”.

Office.eu’s official migration flow is designed to move data from providers such as Microsoft 365 or Google Workspace. Even so, the exact scope depends on which data is available in the source, permissions, mailbox size and the interfaces each platform allows you to use.

Data that is usually in scope

  • Email: mailboxes, folders, attachments and messages.
  • Contacts: personal or corporate contacts, depending on availability and export options.
  • Calendars: events, invitations and meetings, provided the source allows them to be extracted correctly.
  • Files: documents stored in OneDrive, SharePoint or downloaded from Microsoft 365 to be uploaded to EU Drive.
  • Office documents: Word, Excel and PowerPoint, with prior testing to validate formatting and features.

Elements that need special treatment

  • Teams: teams, channels, chats, recordings, tabs and apps are not automatically converted into EU Talk.
  • Complex SharePoint: intranets, lists, inherited permissions, flows, metadata and modern pages require analysis.
  • Power Platform: Power Apps, Power Automate and Power BI are not migrated as such to Office.eu; they must be redesigned or kept separately.
  • Intune: devices, profiles, compliance, applications and policies do not have a direct migration path to Office.eu.
  • Purview and compliance: labels, retention, eDiscovery and DLP must be reviewed with a dedicated plan.
MSAdvance advice:

Before migrating, split the inventory into three groups: migrate, archive and redesign. Trying to move everything as-is is usually more expensive, slower and less useful.

3. Recommended migration methodology

In practice: the migration should be done in phases, with a pilot and validations, not in a single improvised cutover.

To migrate Microsoft 365 to Office.eu without surprises, we recommend a wave-based model. This makes it possible to check compatibility, adjust communication, measure incidents and correct issues before scaling.

Recommended phases of a Microsoft 365 to Office.eu migration
PhaseObjectiveExpected result
AssessmentUnderstand what exists in Microsoft 365 and what depends on what.Inventory, risks and real scope.
DesignDecide target architecture, domain, users, security and waves.Migration plan and communication plan.
PilotTest Office.eu with real users, mailboxes and documents.Validation of email, files, compatibility and adoption.
Wave-based migrationMove users and data in a controlled way.Users operational in Office.eu without loss of relevant information.
Domain cutoverSwitch mail flow and DNS to Office.eu.Email working in Office.eu with SPF, DKIM and DMARC reviewed.
StabilisationResolve incidents, adjust permissions and reinforce training.Stable adoption and controlled closure of Microsoft 365 where appropriate.

The key is not migrating fast: it is migrating with an acceptable business experience. If users can read email, find files, open documents and hold meetings without losing productivity, the migration is perceived as successful.

4. Assessment: Microsoft 365 inventory before migrating

In practice: you cannot migrate well what you do not understand.

The assessment is the phase that reduces the most risk. It helps you understand what is used in Microsoft 365, how large it is, what depends on what and what should not be moved without review.

4.1 Email inventory

  • User mailboxes.
  • Shared mailboxes.
  • Aliases and secondary addresses.
  • Distribution lists and groups.
  • Transport rules.
  • Mailbox size and attachments.
  • Shared calendars and delegations.

4.2 File inventory

  • OneDrive per user: volume, critical folders, external sharing.
  • SharePoint: sites, libraries, permissions, owners and actual usage.
  • Teams: files associated with teams and channels.
  • Local or synchronised files that are not really in the cloud.
  • Documents with macros, templates or external links.

4.3 Collaboration and process inventory

  • Teams: active teams, channels, guests, meetings and recordings.
  • Power Automate: flows linked to SharePoint, Outlook, Teams or Excel.
  • Power Apps and Power BI: apps, reports and connectors.
  • Third-party applications connected to Microsoft 365.
  • Devices managed by Intune.
Typical example:

A company thinks it only needs to migrate “email and files”. During the assessment, it appears that billing depends on a Power Automate flow, management uses shared calendars, sales has templates with macros and support stores documentation in a critical Teams workspace. If this is not detected beforehand, the migration creates incidents even if email has been moved correctly.

5. Pilot: test Office.eu with real users and documents

In practice: the pilot avoids theoretical debates and makes it possible to check whether Office.eu fits real work.

Before migrating the whole company, it is worth running a pilot with representative users. It should not only be done with technical profiles. Ideally, it should include business users who use email, calendar, documents and files every day.

What the pilot should test

  • Receiving and sending email.
  • Importing folders, attachments, contacts and calendars.
  • Use of the corporate domain in EU Email.
  • Opening and editing .docx documents.
  • Opening and editing real .xlsx spreadsheets.
  • Presentations with corporate formatting.
  • External file sharing in EU Drive.
  • Meetings and calls with EU Talk.
  • Work on mobile and desktop.

Documents that should definitely be tested

  • Proposal and contract templates.
  • Financial Excel files with complex formulas.
  • Sales PowerPoints with corporate designs.
  • Documents with comments and track changes.
  • Files shared with customers or suppliers.

The pilot must end with a clear decision: what can be migrated unchanged, what needs adaptation and what should temporarily remain in Microsoft 365 or in an alternative tool.

6. Migrate Exchange Online to EU Email

In practice: email is the first thing users judge. If email works, the migration starts with trust.

The migration from Exchange Online to EU Email must be prepared with particular care because it affects the whole company: sales, customer service, billing, management and support.

6.1 What needs to be migrated

  • Messages and folders.
  • Attachments.
  • Contacts.
  • Calendars.
  • Primary and secondary aliases.
  • Shared mailboxes or functional mailboxes, if they exist.

6.2 Recommended plan

  1. Inventory: mailbox sizes, shared mailboxes, aliases, lists and rules.
  2. Pilot: migrate several real mailboxes and check reading, search, folders and calendar.
  3. Pre-migration: start copying while users continue working in Microsoft 365.
  4. Validation: review migrated data in Office.eu before the cutover.
  5. Cutover: change MX and mail records when the final switch is decided.
  6. Support: help users configure clients, mobile devices and the new experience.

6.3 Shared mailboxes and functional addresses

Before migrating, it is worth reviewing whether addresses such as info@, sales@, support@ or billing@ are used. These addresses are often critical and must be tested before the cutover.

Practical advice:

Do not perform the email cutover without a checklist for each critical mailbox. A poorly configured shared mailbox can affect the business more than ten personal mailboxes.

7. Migrate calendars and contacts

In practice: calendars are small, but they create a lot of noise when they fail.

In a Microsoft 365 to Office.eu migration, calendars and contacts often seem “secondary” until they stop working. A lost meeting, an invitation that does not arrive or an incomplete contact list can create a lot of frustration.

What to review

  • Personal calendars.
  • Shared calendars.
  • Recurring events.
  • Invitations with external users.
  • Personal and corporate contacts.
  • Address books and distribution lists.

Best practices

  • Test recurring events in the pilot.
  • Check invitations sent to external users.
  • Tell users to review their upcoming meetings after the change.
  • Export critical contacts if there are doubts about compatibility.
  • Validate management, room or resource calendars before go-live.

8. Migrate OneDrive and SharePoint to EU Drive

In practice: file migration is the perfect opportunity to organise, not to copy chaos.

OneDrive and SharePoint often mix personal documents, team files, intranets, templates, deliverables, archives and folders shared with external users. Migrating everything without cleaning up can turn Office.eu into a copy of the same disorder.

8.1 OneDrive: personal work files

OneDrive usually contains drafts, personal work documents and informally shared files. Before migrating, it is worth separating:

  • Personal files that should be moved.
  • Obsolete files that can be archived.
  • Documents that should move to a team folder in EU Drive.
  • Files shared with customers or suppliers that will require new links.

8.2 SharePoint: team documentation

SharePoint requires a more careful review. Copying documents is not enough: permissions, owners, versions, metadata, pages, lists and automations must be reviewed.

  • Active sites and abandoned sites.
  • Critical document libraries.
  • Special permissions or broken inheritance.
  • External shared links.
  • SharePoint lists used as a process base.
  • Power Automate flows linked to the site.

8.3 EU Drive as the destination

EU Drive can become the central file space, with team folders, synchronisation, controlled sharing and manageable links. The key is to design a simple structure:

  • Folders by area, customer, project or process.
  • Clear permissions by team.
  • Rules for sharing with external users.
  • Archive policy for historical content.
  • User guide: “what goes in my space and what goes in a shared folder”.
Typical example:

A company migrates SharePoint to EU Drive and uses the opportunity to remove old sites, merge duplicate libraries and create a department-based structure. The result is not just a migration: it is an improvement in document organisation.

9. Document compatibility: Word, Excel and PowerPoint

In practice: compatibility is not validated with simple documents, but with the files the company uses every day.

Office.eu offers document, spreadsheet and presentation editing with compatibility for common formats such as .docx and .xlsx. Even so, any migration from Microsoft 365 should test real documents, because not all files behave the same outside the Microsoft ecosystem.

Documents worth reviewing

  • Word: templates, corporate styles, complex tables, track changes, comments and long documents.
  • Excel: advanced formulas, pivot tables, macros, external links, Power Query and financial models.
  • PowerPoint: sales templates, fonts, animations, embedded charts and presentations with advanced design.

How to decide whether a document is suitable

Recommended document classification before migrating
File typeRecommended actionExample
SimpleMigrate and validate in bulk.Letters, simple reports, internal documents.
ImportantTest in the pilot with real users.Proposals, contracts, sales presentations.
ComplexReview case by case.Excel with macros, financial models, Power Query.
CriticalDecide whether to keep it temporarily in Microsoft or redesign it.Legal templates, financial reporting, regulated documents.

Compatibility should not be treated as a generic “yes/no”. The right approach is to test the documents that actually support the business.

10. What to do with Microsoft Teams when migrating to Office.eu

In practice: Teams is not migrated “as-is” to Office.eu; the way of collaborating is redesigned.

Microsoft Teams is more than video calls. It includes chats, channels, meetings, files, tabs, apps, recordings, integrations and permissions. When migrating to Office.eu, you need to decide which part of Teams should be preserved, what is archived and what is replaced by EU Talk and EU Drive.

What can be handled relatively easily

  • Teams files, because they are usually stored in SharePoint.
  • Documents shared in channels.
  • Meeting materials saved as files.
  • Lists of teams and members to redesign groups in Office.eu.

What requires strategy

  • 1:1 chats and group chats.
  • Historical channel conversations.
  • Meeting recordings.
  • Tabs with third-party apps.
  • Planner, Forms, Power Apps or flows integrated into Teams.
  • Teams Phone or Teams Rooms telephony.

Recommended approach

  1. Inventory active Teams and critical teams.
  2. Export or preserve evidence if there are legal requirements.
  3. Migrate relevant files to EU Drive.
  4. Define new collaboration spaces in Office.eu.
  5. Train users in EU Talk and the new working rules.
Important message for users:

It is not advisable to promise that Teams will appear “the same” in Office.eu. The right thing is to explain what is preserved, what is archived and what the new way of collaborating will look like.

11. Power Platform, Intune and other Microsoft dependencies

In practice: some Microsoft 365 components are not migrated to Office.eu; they are replaced, retained or redesigned.

Many companies use Microsoft 365 as a productivity platform, but also as an automation, security and management platform. Before migrating to Office.eu, you need to review what depends on Microsoft and what alternative will be used.

Power Platform

  • Power Automate: flows with Outlook, SharePoint, Teams or Forms must be reviewed and redesigned.
  • Power Apps: internal applications may depend on Dataverse, SharePoint or Microsoft connectors.
  • Power BI: reports and models are not migrated to Office.eu as a natural part of the change.

Intune and device management

  • Intune is not automatically replaced by Office.eu.
  • If Microsoft 365 is abandoned, you need to decide how devices, compliance, encryption and applications will be managed.
  • It may be necessary to retain some Microsoft licences for security, devices or specific applications.

Security and compliance

  • Entra ID, Conditional Access, Defender and Purview must be reviewed before disabling or reducing Microsoft 365.
  • Retention and eDiscovery policies require a conservation and export plan.
  • Sensitivity labels and DLP are not automatically “transformed” into Office.eu policies.
Frequent decision:

Some organisations migrate email and files to Office.eu, but temporarily retain certain Microsoft licences for identity, devices, BI or automations. This hybrid approach can be a good transition if there are important dependencies.

12. Domain and DNS: MX, SPF, DKIM and DMARC

In practice: the DNS change is the moment when users feel that the migration “is now real”.

For email to start arriving in Office.eu, DNS records must be changed. This must be done carefully, because an incorrect configuration can cause lost emails, bounces or reputation problems.

Common records to review

  • MX: indicates which server receives email for the domain.
  • SPF: authorises which servers can send email on behalf of the domain.
  • DKIM: signs outgoing email to improve authenticity.
  • DMARC: defines how recipients should act when SPF/DKIM checks fail.
  • Autodiscover or other records: if there are dependencies with previous clients or services.

Recommended plan for the domain cutover

  1. Review all current DNS records.
  2. Lower TTL before the change to speed up propagation.
  3. Prepare Office.eu records without activating the cutover until the planned time.
  4. Execute the change in a window with support available.
  5. Validate sending, receiving, SPF, DKIM and DMARC.
  6. Maintain monitoring during the first few days.
Conceptual example of a DNS checklist
MX     → destination email provider


SPF    → include only the services authorised to send
DKIM   → activate signing for outgoing email
DMARC  → start with monitoring and harden gradually

If the domain remains associated with Microsoft 365 for a while, it should not be removed without reviewing users, aliases, groups, shared mailboxes and applications that still reference it.

Do you want to know whether your Microsoft 365 is ready to migrate to Office.eu?

MSAdvance can carry out a Microsoft 365 to Office.eu migration assessment to detect risks, dependencies, data to move, DNS, document compatibility and adoption effort.

Request an assessment View services

13. Security, privacy and compliance

In practice: migrating to Office.eu is also a data governance decision.

One of the reasons to consider Office.eu is its European positioning, its privacy approach and its proposal to reduce dependence on non-European providers. Even so, a secure migration does not depend only on the provider: it depends on how the platform is configured and how users, permissions and data are managed.

Aspects to review before migrating

  • Data location and processing.
  • Data processing agreements and legal documentation.
  • Administration roles.
  • Password and authentication policies.
  • External sharing permissions.
  • Document retention and legal archive.
  • Data export from Microsoft 365 before closing the tenant.

What should not be forgotten

If the organisation has regulatory requirements, it must review which information must be kept in Microsoft 365, what is exported, what is migrated and what evidence must be retained. This applies especially to sectors with audits, public contracts, sensitive data or retention requirements.

14. Microsoft 365 vs Office.eu: an honest comparison

In practice: the decision is not “which one is better”, but which one fits your way of working and your priorities better.

Practical comparison: Microsoft 365 vs Office.eu
AreaMicrosoft 365Office.euRecommendation
EmailExchange Online and Outlook, very mature.EU Email for professional email integrated into the workspace.Pilot real mailboxes and calendars before cutover.
FilesOneDrive, SharePoint and Teams integrated.EU Drive with a clear focus on storage and sharing.Organise the document structure before migrating.
DocumentsMaximum compatibility with Word, Excel and PowerPoint.Compatibility with common formats, with possible edge cases.Test templates, advanced Excel files and corporate presentations.
Meetings and chatTeams, very powerful and with many enterprise features.EU Talk, lighter and integrated into the environment.Redesign collaboration; do not promise a copy of Teams.
AutomationPower Automate, Power Apps, Graph and connectors.Must be evaluated case by case.Inventory processes before migrating.
Device managementIntune and advanced security.Not a direct replacement for Intune.Define a device strategy if Microsoft is abandoned.
Sovereignty and controlResidency and compliance options within the Microsoft ecosystem.European proposition, hosted in Europe and based on open technologies.Fits when the priority is control, transparency and reduced dependence.

15. Operational checklists: before, during and after

15.1 Before migrating

  • Inventory users, mailboxes, aliases and domains.
  • Inventory OneDrive, SharePoint, Teams and critical files.
  • Review Power Platform, Intune, Defender, Purview and connected applications.
  • Select pilot users.
  • Test real documents in Office.eu.
  • Communication and training plan.
  • DNS plan and cutover window.
  • Backup/export plan before closing Microsoft services.

15.2 During the migration

  • Execute wave-based migration.
  • Validate email, calendars, contacts and files by batch.
  • Resolve incidents before scaling to the next group.
  • Communicate progress and next steps to users.
  • Log errors and decisions.

15.3 After the migration

  • Validate email delivery and domain authentication.
  • Review shared files and permissions.
  • Support users with usage questions.
  • Confirm which data is kept in Microsoft 365 and for how long.
  • Deactivate old services only when there are no dependencies.
  • Review incident, adoption and satisfaction KPIs.

16. Common mistakes when migrating Microsoft 365 to Office.eu

Common mistakes and how to avoid them
MistakeWhat happensHow to avoid it
Assuming Office.eu is a Microsoft 365 cloneUsers expect everything to work the same way.Explain the differences and run a pilot with real cases.
Not reviewing TeamsChats, context or workflows are lost.Define what is archived, what is migrated and what is redesigned.
Moving files without cleaning upEU Drive is born disorganised.Classify content: migrate, archive or delete.
Not testing complex documentsFormulas, macros or formats do not work the same way.Validate templates and critical documents in the pilot.
Improvising DNSEmail has bounces or poor authentication.Plan MX, SPF, DKIM, DMARC and TTL.
Forgetting Power PlatformInternal flows stop working.Inventory automations before the cutover.
Communicating too lateFrustrated users and more tickets.Short guides, role-based sessions and close support.

17. KPIs and success criteria

In practice: a migration does not end when data is copied, but when users can work normally.

Recommended KPIs for a Microsoft 365 to Office.eu migration
AreaKPIRecommended objective
EmailSending and receiving after cutoverNo critical incidents.
CalendarsMigrated events and upcoming meetings verifiedValidation by pilot users and critical areas.
FilesCritical documents available in EU DriveAccess confirmed by owners.
CompatibilityTemplates and real documents testedNo blockers in key processes.
SupportIncidents per user after go-liveBelow the agreed threshold.
AdoptionActive users in Office.euStable usage after the support phase.

18. Frequently asked questions about migrating Microsoft 365 to Office.eu

Can Microsoft 365 be migrated to Office.eu?

Yes. A migration from Microsoft 365 to Office.eu can be planned for email, calendars, contacts and files, provided the data is accessible and the scope is well defined. The important thing is to analyse in advance what can be moved directly and what requires redesign.

Does Office.eu completely replace Microsoft 365?

It depends on usage. For email, files, documents, calendar and basic collaboration, it can be a very interesting alternative. If the company uses Teams, Power Platform, Intune, Purview or advanced Excel intensively, it is best to run a pilot and consider a gradual approach.

What data is migrated from Microsoft 365?

The usual scope includes email, folders, attachments, contacts, calendars and files. SharePoint, Teams, Power Platform and Intune must be reviewed separately because they do not have a complete direct equivalent in Office.eu.

Can Exchange Online be migrated to EU Email?

Yes, provided the source, destination, mailboxes, aliases and domain are properly prepared. The recommended approach is to migrate in phases, validate pilot mailboxes and perform the DNS change when everything has been tested.

What happens to OneDrive and SharePoint?

Files can be moved to EU Drive, but permissions, shared links, versions, metadata or automations are not always preserved identically. That is why it is recommended to clean up and redesign the document structure before migrating.

What happens to Microsoft Teams?

Teams is not migrated as an exact copy to Office.eu. Associated files can be treated as document content, but chats, channels, recordings, apps and tabs require a specific archiving, export or redesign strategy.

Do Word, Excel and PowerPoint documents work in Office.eu?

Office.eu offers compatibility with common formats such as .docx and .xlsx, but real documents should be tested. Simple files are usually less problematic; Excel files with macros, complex models or heavily designed templates should be validated in the pilot.

Is there downtime when migrating from Microsoft 365 to Office.eu?

The migration can be done in phases to reduce disruption. The most sensitive moment is the email and DNS cutover. If MX, SPF, DKIM, DMARC and the support window are properly prepared, the impact can be very low.

Can I keep Microsoft 365 and Office.eu at the same time for a while?

Yes, many projects use a coexistence or transition phase. It may make sense to keep Microsoft 365 for certain specific workloads while email, files and basic collaboration move to Office.eu.

Can MSAdvance handle the full migration?

Yes. MSAdvance can help with assessment, planning, pilot, data migration, DNS cutover, compatibility validation, user support and post-migration assistance.

19. Official resources and useful links

Office.eu

  • Office.eu — European productivity suite
  • Migration to Office.eu
  • Office.eu for businesses and SMEs
  • Office.eu vs Microsoft 365
  • Official Office.eu FAQ

Microsoft 365

  • Microsoft Learn — remove a domain from Microsoft 365
  • Microsoft Learn — external DNS records for Microsoft 365
  • Microsoft Purview — export eDiscovery search results
  • Microsoft Teams — export content with Teams Export APIs
  • Microsoft Support — download files from OneDrive or SharePoint

MSAdvance

  • Contact MSAdvance
  • MSAdvance services
  • Modern Workplace and collaboration
  • Microsoft 365 migration

20. Conclusion and next steps

Migrating Microsoft 365 to Office.eu can be a very interesting decision for organisations that want a European suite, more control over their data and a work experience centred on email, files, documents, calendar and collaboration.

But the migration must be approached realistically. Not everything that exists in Microsoft 365 has a direct equivalent in Office.eu. That is why, before moving users, it is worth reviewing email, files, Teams, SharePoint, Power Platform, Intune, critical documents, domain and DNS.

Recommended next steps

  • Carry out a Microsoft 365 assessment to identify workloads, data and dependencies.
  • Choose a pilot group with real users and documents.
  • Validate email, calendar, contacts, files and document compatibility.
  • Prepare the DNS plan and change window.
  • Design communication and support for users.

Do you want MSAdvance to plan and execute the migration to Office.eu?

We help you analyse your current Microsoft 365 environment, design the transition, migrate data, prepare DNS and support users so the change is orderly, secure and easy to adopt.

Contact MSAdvance View services

Migrate Microsoft 365 to Office.eu: complete guide for email, files and collaboration

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