Microsoft 365 Migration Services UK: Costs, Support & Providers Quick answer
Microsoft 365 migration services help businesses move email, files, users and collaboration tools into Microsoft 365, or move data between existing Microsoft 365 environments and can usually help you with:
Exchange and email migration
Office 365 migration
Microsoft 365 setup
Google Workspace migration
Gmail migration
Exchange Server migration
tenant-to-tenant migration
SharePoint migration
OneDrive migration
Teams migration
file server migration
user account migration
Microsoft 365 licences
DNS and domain changes
security configuration
MFA setup
device configuration
migration planning
staff support
post-migration troubleshooting
For a straightforward UK small business migration, professional services may start from around £1,500-£4,000, but more involved migrations covering multiple workloads, larger numbers of users, SharePoint, Teams, legacy Exchange or separate Microsoft 365 tenants can cost £5,000-£30,000+ .
Very large or technically complex migrations are normally individually quoted.
Migration requirement Typical option
Business email only
Exchange Online/email migration
Gmail or Google Workspace
Google Workspace to Microsoft 365
Old Exchange Server
Exchange to Microsoft 365 migration
Files on a local server
SharePoint/OneDrive migration
Two Microsoft tenants
Tenant-to-tenant migration
Company merger
Multi-workload tenant migration
Email, files and Teams
Full Microsoft 365 migration
Small business with little internal IT
Fully managed migration
Existing Microsoft 365 setup needs fixing
Microsoft 365 consultancy/support
Compare Microsoft 365 Migration Quotes
Free quotes • No obligation • Compare UK Microsoft 365 migration specialists
Compare Microsoft 365 migration services This guide is for UK businesses comparing:
Microsoft 365 migration
Microsoft 365 migration services
Microsoft 365 migration services UK
Office 365 migration
Office 365 migration services
Office 365 migration UK
Microsoft 365 migration company
Microsoft 365 migration provider
Microsoft 365 migration consultant
Microsoft 365 migration costs
Office 365 migration costs
Exchange to Microsoft 365 migration
email migration to Office 365
Microsoft 365 tenant migration
tenant-to-tenant migration
SharePoint migration
OneDrive migration
Microsoft Teams migration
Google Workspace to Microsoft 365 migration
Gmail to Office 365 migration
file server to SharePoint migration
Microsoft 365 deployment
Microsoft 365 setup services
Microsoft cloud migration
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: August 2026
Key takeaways
Microsoft 365 migration can involve much more than simply transferring email.
Microsoft now uses the Microsoft 365 name, although Office 365 migration remains a commonly used term.
Common projects include Exchange, Gmail, Google Workspace, file servers and Microsoft 365 tenant-to-tenant migrations.
Microsoft provides native tools for several migration scenarios, including mailbox, OneDrive, SharePoint and tenant-to-tenant migration.
More complicated projects may still require specialist migration software or a Microsoft partner.
A simple small-business email migration can cost considerably less than a SharePoint, Teams or tenant consolidation project.
Licensing costs and migration costs are normally separate.
The amount of data often matters just as much as the number of employees.
Ask providers exactly what happens before, during and after the migration.
Backups, identity, MFA, permissions, DNS and user support should be addressed before the cutover.
For complex migrations, compare at least two or three properly scoped quotes rather than choosing solely on a day rate.
Contents
Office 365 vs Microsoft 365 migration
What can be migrated to Microsoft 365?
What affects Microsoft 365 migration costs?
Microsoft 365 tenant-to-tenant migration
What needs to be planned before a tenant migration?
What is Microsoft 365 migration? Microsoft 365 migration is the process of moving your businesses users, email, files, applications or collaboration data into Microsoft 365, and it can also mean moving data from one Microsoft 365 tenant to another .
For example, you might want to migrate:
email from an old Exchange Server
Gmail into Exchange Online
Google Drive into OneDrive
shared drives into SharePoint
local business files into Microsoft 365
users from one Microsoft tenant into another
SharePoint sites following a merger
OneDrive accounts between organisations
Microsoft Teams data
calendars and contacts
distribution lists
shared mailboxes
archive mailboxes
Office 365 vs Microsoft 365 migration You might see providers advertising both Office 365 migration and Microsoft 365 migration, and for most businesses looking for migration services, the terms describe broadly the same type of project.
Office 365 was Microsoft’s earlier branding for its cloud productivity suite. Microsoft now primarily uses Microsoft 365.
That means if you’re searching for:
“Office 365 email migration”
You could actually be looking for exactly the same provider as somebody searching for:
“Microsoft 365 migration services”.
So a heads up – we use both terms in this guide because both are still widely understood by UK businesses.
What can be migrated to Microsoft 365? Business email
Email is one of the most common migration projects and a good provider can move:
mailboxes
folders
emails
contacts
calendars
shared mailboxes
distribution groups
archive mailboxes
mailbox permissions
Possible starting platforms include:
Microsoft Exchange Server
hosted Exchange
Gmail
Google Workspace
IMAP email
POP email
another Microsoft 365 tenant
Files
Business files can be moved from:
file servers
network drives
PCs
Google Drive
Dropbox
Box
existing SharePoint sites
another Microsoft 365 tenant
The destination may be either:
OneDrive for individual user files,
or:
SharePoint for shared company and departmental information.
SharePoint
SharePoint migrations tend to require more planning because you might need to preserve:
folders
document libraries
permissions
metadata
versions
sharing settings
site structure
retention requirements
Old SharePoint environments can also contain years of data that nobody needs anymore – so a migration can therefore be a useful opportunity to remove redundant information rather than copying it blindly into the new system.
OneDrive
OneDrive migrations can include:
user documents
folders
sharing permissions
Microsoft 365 tenant transfers
Google Drive data
personal network folders
Microsoft Teams
Teams migration can be more complicated than moving email and depending on the project, it can involve:
Teams
channels
files
Microsoft 365 Groups
meeting information
permissions
membership
associated SharePoint data
Microsoft 365 migration costs UK There is no standard Microsoft 365 migration price.
Here is our rough UK guide:
Migration
Very small email-only migration
Small business Microsoft 365 migration
25-100 user migration
Exchange Server migration
Google Workspace migration
File server and SharePoint migration
Microsoft 365 tenant-to-tenant migration
Complex multi-workload migration
Large enterprise migration
These figures should be treated as budgeting guides rather than fixed prices – always compare like with like.
What affects Microsoft 365 migration costs? Number of users
More users generally means:
more accounts
more mailboxes
more devices
more licences
more user support
more migration batches
But user count alone does not determine price as ten users with enormous mailboxes and complicated file permissions could be harder to migrate than 50 users with simple email accounts.
Your amount of data
Providers should assess:
mailbox sizes
archive sizes
file server storage
OneDrive storage
SharePoint data
Teams files
historic information
Your existing system
Moving from straightforward hosted email is different from migrating:
Exchange Server
Google Workspace
multiple email domains
several Microsoft tenants
legacy SharePoint
hybrid Exchange
complex Active Directory environments
Number of workloads
An email-only project is normally cheaper than migrating:
Exchange
OneDrive
SharePoint
Teams
file servers
user identities
devices
at the same time.
Your businesses security requirements
You might want the provider to configure:
multifactor authentication
Conditional Access
Microsoft Defender
administrator roles
device policies
data loss prevention
email security
retention
compliance policies
security groups
This adds work but can prevent you carrying weak security settings into a new environment.
Out-of-hours work
Some businesses want the final cutover carried out:
overnight
at weekends
on bank holidays
outside trading hours
Microsoft 365 tenant-to-tenant migration Tenant-to-tenant migration means moving users and data from one Microsoft 365 organisation into another and commonly happens because of:
mergers
acquisitions
company sales
divestments
restructuring
consolidating separate businesses
correcting an unsuitable historic tenant setup
Microsoft also highlights several areas that need planning before the move, including:
user identities
domains
workload dependencies
coexistence
licences
data volume
migration sequencing
What needs to be planned before a tenant migration? Identity
You need to establish which old user account maps to which new user and that mapping needs to be planned before data starts moving.
Domains
If the same email domain needs to move between Microsoft 365 tenants, DNS and domain ownership have to be carefully coordinated and rememember, poorly planned domain changes can affect email delivery.
Email
You need to determine how mail flows while users are being moved.
SharePoint and OneDrive
Permissions and user ownership need particular attention as migrating the files without correctly mapping the users can leave staff unable to access information afterwards.
Teams
Teams has dependencies on other Microsoft services and migration sequencing therefore matters.
Licences
Users normally need appropriate licences in the destination Microsoft 365 tenant – do not
Exchange to Microsoft 365 migration Businesses still running their own Exchange Server may move email to Exchange Online as part of Microsoft 365 and this can be great because:
reducing reliance on local email servers
less hardware management
easier remote access
Microsoft 365 integration
improved collaboration
simpler updates
access to Microsoft’s cloud security features
But migration should include more than copying mail, so check:
Exchange version
mailbox sizes
public folders
shared mailboxes
Active Directory
email routing
third-party applications
printers and scanners
SMTP services
archive systems
backups
compliance requirements
Do not switch off an old Exchange environment immediately simply because users can see their email in Outlook as your migration should be tested first.
Google Workspace to Microsoft 365 migration If you’re moving from Google, check:
Google service
Gmail
Google Calendar
Google Contacts
Google Drive
Google Meet
Google Docs/Sheets
File server to SharePoint and OneDrive migration A common Microsoft 365 project is replacing an old shared drive or file server.
However: a file server should not simply be copied wholesale into SharePoint.
Before migration, you should review:
duplicate files
obsolete folders
employee personal data
permissions
folder depth
file names
file types
sensitive information
departmental ownership
retention requirements
You can then determine whether information belongs in:
OneDrive
SharePoint
Teams
an archive
another business system
nowhere at all
Removing unnecessary data before migration can reduce cost and make Microsoft 365 much easier to use afterwards.
How long does Microsoft 365 migration take? A migration can take anywhere from a few days to several months.
As a rough guide:
Project
Very small email migration
Small Microsoft 365 migration
25-100 users
Exchange migration
Google Workspace migration
Tenant-to-tenant migration
Large enterprise project
the good news? This does not necessarily mean staff are unable to work for weeks.
Most of that period is spent on:
discovery
preparation
configuration
testing
pre-staging data
migration batches
user communication
Will there be downtime? A properly planned Microsoft 365 migration should aim to minimise downtime – some projects can be carried out with very little interruption.
However, there may still be a point where:
DNS records change
users sign into new accounts
Outlook profiles change
devices need reconfiguration
Teams access changes
shared drives move
passwords change
What should Microsoft 365 migration services include? A properly scoped service will likely cover:
Stage
Discovery
Existing users, email, files, apps and security reviewed
Planning
Migration method and timetable agreed
Licensing
Correct Microsoft 365 plans selected
Tenant configuration
Microsoft 365 environment configured
Security
MFA, permissions and policies
Pilot
Test users migrated first
Data migration
Email/files/workloads transferred
Cutover
Domains and live services switched
Devices
Outlook and user devices configured
Testing
Email, files and permissions checked
User support
Problems handled after migration
Documentation
Admin information supplied
Ongoing support
Optional Microsoft 365 management
Microsoft 365 migration checklist Before approving a quote, establish:
how many users are migrating
which email system you currently use
mailbox sizes
archive mailbox sizes
number of shared mailboxes
file server storage
Google Drive storage
SharePoint storage
OneDrive storage
Teams usage
existing Microsoft 365 tenants
domains
DNS provider
identity setup
Active Directory
security requirements
MFA requirements
third-party integrations
apps that send email
printers/scanners using email
backup requirements
data retention
migration deadline
acceptable downtime
staff support requirements
training requirements
Choosing a Microsoft 365 migration provider Microsoft partner A Microsoft specialist or partner can be useful where the provider has direct experience with:
Microsoft 365
Exchange
Azure
Entra ID
SharePoint
Teams
security
migration tooling
But Microsoft partner status should not be your only selection criterion so be sure to ask what migrations the actual engineering team has completed.
Managed service provider An MSP can be appropriate if you want the same company to:
migrate Microsoft 365, and then
support it afterwards.
We like this option because this can reduce handovers between migration consultants and ongoing IT support.
Microsoft 365 consultancy A specialist consultancy can be a better fit for:
complex tenant migration
mergers
Exchange hybrid
complicated SharePoint estates
large migrations
security redesign
compliance projects
Some consultancies will complete the migration and then hand the environment back to your internal IT team.
Questions to ask Microsoft 365 migration companies Ask prospective providers:
Have you migrated businesses similar to ours?
Which Microsoft 365 workloads are included?
Is email migration included?
Is SharePoint included?
Is OneDrive included?
Is Teams included?
Are shared mailboxes included?
Are archive mailboxes included?
Is file server migration included?
Is DNS work included?
Will you configure MFA?
Will you review security settings?
Who purchases the Microsoft licences?
Are licence costs included?
Will you run a pilot migration?
How do you protect data during migration?
How long is the likely cutover?
Will users need new passwords?
Will Outlook need reconfiguring?
Do you configure phones and tablets?
Is out-of-hours migration included?
What happens if something fails?
Is rollback possible?
How long is post-migration support included?
What costs extra?
Is the project fixed-price or time-and-materials?
Who owns the Microsoft 365 tenant afterwards?
Does Microsoft 365 include backup? Microsoft provides resilience and recovery capabilities within Microsoft 365, but businesses should still decide what level of independent backup and retention they require, so ask:
how long deleted data can be recovered
whether you need third-party Microsoft 365 backup
what happens if somebody intentionally deletes data
how ransomware recovery would work
whether SharePoint and OneDrive are covered
whether Teams data is covered
how quickly data can be restored
Final verdict Microsoft 365 migration can be straightforward when a small business only needs to move a handful of email accounts but it becomes considerably more technical when the project involves:
Exchange Server
Google Workspace
file servers
SharePoint
OneDrive
Teams
multiple domains
complex identities
company mergers
tenant-to-tenant migration
Rather than choosing the lowest quote, compare:
scope
migration method
security
downtime
support
user assistance
licensing
experience
total project cost
The goal is not simply to get the data into Microsoft 365.
It is to make sure the business can work normally once it gets there.
Compare Microsoft 365 Migration Quotes
Free quotes • No obligation • Compare UK Microsoft 365 and Office 365 migration providers
FAQs: Microsoft 365 migration services How much does Microsoft 365 migration cost in the UK?
A straightforward small-business Microsoft 365 migration may cost roughly £1,500-£4,000. Projects involving more users, Exchange, SharePoint, Teams, file servers or tenant-to-tenant migration can cost £5,000-£30,000+, depending on complexity.
Is Office 365 migration the same as Microsoft 365 migration?
For most businesses searching for migration support, yes. Office 365 is Microsoft’s older product branding. Microsoft now primarily uses Microsoft 365, although businesses and IT providers still commonly use both terms.
How long does Microsoft 365 migration take?
A small migration can be completed within days or a few weeks. Larger migrations involving 25-100+ users or several workloads may take several weeks. Complex tenant-to-tenant projects can take several months.
Can I migrate my existing email to Microsoft 365?
Yes. Email can be migrated from systems including Exchange, hosted Exchange, Gmail, Google Workspace and many IMAP-based email platforms.
Can Gmail be migrated to Microsoft 365?
Yes. Gmail, calendars and other Google Workspace data can be migrated into Microsoft 365.
Can Google Drive be migrated to OneDrive?
Yes, although company-wide shared data may be more appropriately placed in SharePoint rather than individual OneDrive accounts.
Can an Exchange Server be migrated to Microsoft 365?
Yes. Exchange to Exchange Online is one of the most common Microsoft 365 migration projects.
What is a Microsoft 365 tenant-to-tenant migration?
It is the process of moving users and workloads from one Microsoft 365 organisation into another. It is common after mergers, acquisitions, divestments and corporate restructuring.
Can SharePoint be moved between Microsoft 365 tenants?
Yes. Microsoft provides cross-tenant SharePoint migration capabilities, although permissions, identities and site structure need careful planning.
Can OneDrive be moved between Microsoft 365 tenants?
Yes. OneDrive content can be migrated between Microsoft 365 organisations, with users mapped between the source and destination environments.
Can Microsoft Teams be migrated?
Yes, although Teams depends on several other Microsoft 365 services, which can make migration more complicated than moving email alone.
Will Microsoft 365 migration cause downtime?
Some user disruption may occur during the final cutover, although a properly planned migration should aim to minimise it. Ask providers for an estimated user-level outage rather than simply whether the project involves downtime.
Are Microsoft 365 licences included in migration costs?
Not necessarily. Migration professional services and Microsoft 365 subscriptions are normally separate costs. Ask suppliers to itemise them.
Do I need to back up data before migration?
A migration should include a clear approach to protecting existing data and recovering from a failed migration. Discuss backups and rollback procedures with the provider before work begins.
Can Microsoft 365 replace our file server?
In many cases, SharePoint, OneDrive and Teams can replace some traditional file-server use. Whether they are suitable depends on your data, permissions, applications and working practices.
Should I migrate everything from our file server?
Usually not. Migration is a useful opportunity to archive or delete obsolete and duplicate files instead of transferring years of unnecessary data.
Should we configure MFA during the migration?
Yes. Migration is a sensible point to review account security and introduce appropriate MFA and access controls rather than carrying weak security practices into the new environment.
How do I choose a Microsoft 365 migration provider?
Compare Microsoft experience, similar projects, scope, security, migration approach, user support, downtime planning, post-migration support and total price.
Can Microsoft 365 migration be done over a weekend?
Some smaller or well-prepared migrations can have their final cutover completed over a weekend. The discovery, preparation and pre-migration work will normally happen before that.
Is Microsoft 365 migration worth using a specialist for?
For a small email-only move, internal migration may be realistic. Specialist help becomes more valuable for Exchange, SharePoint, Teams, large file volumes, tenant migrations, security requirements and businesses where downtime would be expensive.
Related MSP, cloud and Microsoft guides Cloud connectivity and infrastructure Cloud Connectivity UK https://compareyourbusinesscosts.co.uk/cloud-connectivity
Private Cloud Networking https://compareyourbusinesscosts.co.uk/private-cloud-networking
Business Connectivity Solutions https://compareyourbusinesscosts.co.uk/business-connectivity-solutions
Compare Azure Managed Service Quotes
Compare Azure managed service providers based on your current cloud setup, migration plans, Microsoft 365 usage, security needs, Azure spend, workloads, support requirements and monthly budget.
Free quotes • No obligation • Compare UK Azure MSPs and cloud support providers
Compare Azure Managed Services
Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.