Exchange Migration action plan to Microsoft 365

Simple from Exchange Migrate on-premises to Exchange Online inside Office 365!

Action plan

• Are you coming from Exchange on-premises and if you have 100, 500 or 2000 mailboxes, migrate in cut-over at one time. (Microsoft best practice)
• Exchange Migrations are seen as a project in their own right. They are made important. While Microsoft casually moves your mailbox to a different database every day. This does not have any risk. If you do it right.
• Pre-sync all mailboxes up to 95%. This means that all data is in the cloud until you decide that the migration can continue.
• If the presyncing would take 50 days. And you're afraid that the delta has grown so big. you can always start a 2nd sync so that you are ready to switch to the cloud unscathed in the migration moment.
• Measurability. All preparatory steps are measurable. You can know exactly how much data you can shift to the cloud and calculate what the lead time is. To be on the safe side, allow 2f5% for the unforeseen circumstances.
• Communication. Tell everyone that there will be a migration. But above all: why, what is the vision and strategy? Why migrate? "Can we do 'more' now after the migration?"

Why do you put your Exchange Mailboxes in the cloud?

• There are many possibilities in the integrations within Office- and Microsoft 365. Microsoft's products and services are deeply integrated into Microsoft's eco-system.
• Example: Microsoft 365 and Microsoft Teams sit close together. In this image you can see that it is important that you Exchange environment is integrated into Microsoft Teams

The next steps after mailbox migration

Technical migrations are often an end point of an implementation while they are actually the starting point of an interesting cloud environment with a lot of possibilities. Be sure to read through this article to identify the next steps.