Lessons learned from migrating to Office 365

Astral Traveller's Weblog

My migration of staff email accounts from our onsite Exchange Server to Office 365 continues as I write this, though now at a somewhat quicker pace. With just under 50 mailboxes left to move, I should be done by the the end of this school term. So far the move has been mostly trouble free, with no email being lost. There have been some small incidents that have helped to shape future mailbox moves and have provided valuable lessons. In no order, here’s some of what I’ve learnt along the way:

  • If you plan to migrate your user’s existing mailboxes up to the cloud, you absolutely need a fast internet connection. 20Mbp/s minimum in both directions, but the faster the better.
  • If possible, get your users to perform mail cleanups before you move their mailbox. The less items in a mailbox, the less time it takes to move said mailbox…

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