Migrating to Microsoft 365: What to Expect

Moving to Microsoft 365 - whether from an old email provider, an on-site server, or another platform - sounds daunting. In reality, a well-planned migration is smooth and largely invisible to your team. The horror stories come from migrations that were rushed or unplanned. Here is what a proper one looks like.

The stages of a migration

A good Microsoft 365 migration follows a clear sequence:

1. Discovery and planning. Audit what you have - mailboxes, files, shared drives, the lot - and decide the right plan and licensing for each user.
2. Preparation. Set up the tenant, verify your domain, and configure the foundations - including security and MFA - before data moves.
3. Migration. Move email and files across, usually in a way that keeps the old system running until the new one is verified.
4. Cutover. Switch everyone over to the new environment, point email to Microsoft 365, and confirm everything works.
5. Support and adoption. Help staff settle in and unlock the tools they now have.

How email and files move

Email is typically migrated so that mailboxes - messages, contacts and calendars - arrive intact in the new system, with minimal or no interruption to sending and receiving.

Files move into SharePoint and OneDrive. This is a great opportunity to tidy up: agree what belongs where, archive the junk, and set a sensible structure rather than copying years of mess across.

Avoiding the common pitfalls

• Don't skip planning. Most migration pain comes from inadequate discovery.
• Set up security first. Turn on MFA and protection before go-live, not after.
• Mind the DNS. Email routing depends on correct DNS changes - get this wrong and mail bounces.
• Communicate with staff. Tell people what's changing and when, with a quick how-to.
• Don't bin the old system too soon. Keep it accessible until the new one is fully verified.

Will there be downtime?

Done properly, downtime is minimal to none. Email continues to flow during the transition, and the final cutover is timed to cause least disruption - often outside working hours.

Get backup in place from day one

Remember that Microsoft 365 doesn't fully back up your data, so set up proper backup as part of the migration, not as an afterthought.

Let us handle the heavy lifting

A managed migration takes the risk and stress off your plate. Our IT Support service plans and runs Microsoft 365 migrations with minimal disruption. Request a callback to plan yours.