Migrate to Microsoft 365 cleanly
Mail, calendars, contacts, files, identity, and permissions, moved into Microsoft 365 from whatever you have now. From Google Workspace, from on-premises Exchange, from IMAP, from another M365 tenant. Planned properly, tested properly, cut over without surprise downtime.
Talk to us about M365 migrationA migration day that feels boring. By design.
Properly scoped before any cutover
Mailbox sizes, file volumes, shared drive permissions, calendar delegations, integrations. Discovery up front so the cutover is execution, not exploration.
Permissions migrated, not rebuilt
Where the source supports it, we automate permission migration. Most recently via Microsoft Graph API on a Google-to-M365 move so admins did not manually replicate shared-drive access across hundreds of folders.
Cutover runbook, hour by hour
Every cutover has a written timeline with checkpoints, owners, rollback triggers, and a comms plan for users. So that when Monday lands, nothing is improvised.
Who Office 365 migration work is for
We work with UK SMEs who've decided to move to Microsoft 365 and want the migration done by someone who's done it before, repeatedly. The driver is usually a change in tooling strategy, a shift in security posture, a customer requirement, or simply an old system that has run out of road.
You're migrating from Google Workspace
The most common migration we run. Gmail to Exchange Online, Drive to OneDrive and SharePoint, Calendar to Outlook, identity from Cloud Identity to Entra ID. See our London advisory firm case study for a real example.
You're moving off on-premises Exchange or hosted email
Aging Exchange servers, hosted-email products that have gone stale, or in-house mail that's become a liability. We move you to M365 with mailbox history intact.
You're consolidating multiple M365 tenants
Mergers, acquisitions, group restructures. Tenant-to-tenant migrations are increasingly common and notoriously fiddly. We've done them and we know where the rough edges are.
You inherited a tenant set up by someone who shouldn't have been near it
Possibly the most common scenario. We can either remediate in place or migrate to a clean tenant, depending on which is cheaper and safer. We'll be honest about the choice.
You want the migration to also fix the security posture
Migration is the right moment to put MFA, conditional access, SPF/DKIM/DMARC, and proper identity hardening in place. We do that as part of the move rather than as a separate project.
Everything the move actually involves.
Discovery and licensing review
What's currently in use, what licences you need, what licences you don't, and a tenant design that matches. Licensing is often where Office 365 migrations leak money, and we catch that early.
Tenant setup and hardening
New or existing tenant brought to a secure baseline: MFA, conditional access, SPF/DKIM/DMARC, anti-phishing policies, sharing controls.
Identity and account migration
From Cloud Identity, on-prem AD, or another tenant. Entra ID configured properly, SSO where it applies, sensible group strategy.
Mailbox migration
BitTitan, native tools, or third-party where appropriate. Mailbox history, folder structure, calendars, contacts, delegations, all migrated cleanly with cutover comms.
File migration
Drive or shared drives to OneDrive and SharePoint. Permissions migrated rather than rebuilt where the source allows it, including via Microsoft Graph API automation.
Teams and collaboration setup
Teams architecture, channels, governance, federation. Migration from Google Meet/Chat or Slack where relevant.
Cutover planning and comms
Hour-by-hour runbook, user comms in advance, support staffed for cutover day, rollback plan if needed. Boring on the day is the goal.
Post-migration support
30-day stabilisation period included. Documentation, handover, and the option to continue with ongoing M365 admin. See our Microsoft 365 service for the full ongoing picture.
Migrations that have actually been delivered
We've planned and executed M365 migrations across businesses of 5 to 200 staff, including a London advisory firm whose Google Workspace estate moved to Microsoft 365 in 6 weeks with permissions automatically replicated via Microsoft Graph API rather than manually reconfigured. That's the kind of detail that's invisible if you've never had to do it the manual way, and that's exactly why we automate. We've also done multi-tenant consolidations, on-prem-to-cloud Exchange moves, and several hosted-email-to-M365 cleanups where the existing setup was years out of date.
How migration engagements work
Office 365 migrations are always project-based. Discovery and design comes first: typically 1-2 weeks, fixed-price, ending in a target tenant design and a migration plan. Execution is the second phase, scoped against the design, and runs anywhere from 2 to 12 weeks depending on the size and source. Post-migration includes a 30-day stabilisation period, after which most clients move into ongoing M365 admin with us. Migration work can also be embedded in a broader fractional CTO engagement when there's wider tooling strategy at play.
Simple as it should be
Discovery and design
Source-system review, target tenant design, licensing review, and migration plan. You see what's coming before we touch anything live.
Pilot and rehearse
Pilot users migrated and tested. Cutover runbook written and signed off. Comms drafted. Rollback rehearsed.
Cutover and stabilise
The main migration runs to plan. 30-day post-migration support sits with us. Documentation and handover follow.
Frequently asked questions
How long does a typical Office 365 migration take?
Depends on size and source. A 10-person Google Workspace move is 2-3 weeks end to end. A 50-person move with shared-drive complexity is 4-8 weeks. A 200-person move with regulatory requirements can run 12+ weeks. The London advisory firm case study took 6 weeks for a mid-sized Google Workspace estate, which is a useful reference point.
Can you migrate Google Workspace shared-drive permissions automatically?
Yes, via Microsoft Graph API. Where the source export gives us the permission mapping, we script the replication into M365 rather than rebuild it manually. This is one of the highest-effort parts of a manual migration and one of the easiest to automate well. We did this on the London advisory firm migration.
Can the migration happen without users losing access to email?
Yes, with mail flow planned properly. We co-exist mail across source and destination during the migration window so users keep sending and receiving, then cut MX over at a planned point. Some users will see a change in their mail client (re-add of the account), but no inbox goes dark.
What about Outlook archives, PSTs, and old mail?
We handle archive migration as a discrete workstream. PSTs can be imported to M365 Archive Mailboxes. Older mail can be moved to long-term retention rather than active mailbox if storage is tight. Whatever the constraint, we plan for it rather than discover it during cutover.
Do you keep us on after the migration or is it a one-shot?
Up to you. Most clients move into ongoing M365 admin after the migration, typically half a day to two days per month depending on size. We'll happily do it as a one-shot project if you'd rather run it in-house afterwards, in which case we make sure the handover documentation is genuinely usable.
Office 365 migrations across Kent and London
Same migration practice, framed for your area. Considering whether to stay on Google Workspace M365 vs Workspace instead? Both are good platforms; we'll be honest about which fits you.
Get the migration sorted
Have a conversation about what you're moving from, what you're moving to, and when. No hard sell, no scaremongering.