What Do I Need?
Before committing to migrating, it’s always important to consider your current environment, and what else can or should migrate alongside:
- Do you have file servers or other cloud storage that could be consolidated?
- Do you rely on any apps which leverage single-sign-on?
- Is there anything that you need that isn’t compatible or requires extra steps to migrate?
The very first step for any migration is setting up your Microsoft 365 tenant, specifically ensuring you have active licenses: the licences are what give your users the mailboxes their email is migrated into. Depending on the licences you go with, you’ll also have access to many other services within Microsoft 365 (it isn’t strictly required, but it could be worth deploying a Zero Trust strategy to be as secure as possible before completing the migration.)
How Long Does It Take?
All sorts of factors can impact how long an email migration takes:
- How many mailboxes do you need to migrate?
- How much data is in each migrating mailbox?
- Where are you migrating from, and how much bandwidth can your environment support?
- How much intervention is needed from migrating users and how much support will they need post-migration?
Outside of these points and your answers to the above section, the biggest factor is which method you go with: Hybrid or Cloud. Hybrid migrations typically take longer, as they can require more preparation pre-migration start, as well as granting the flexibility to migrate users gradually. Cloud migrations can be much faster, as all users generally need to be migrated in one go due to most of the critical changes such as mail routing impacting all users.