Over the years we have completed several O365 migrations. These projects have included migrations of approx 300 mailboxes with a single cut over date and rollout of O365 apps on all computers.
Some of the more complex 0365 migration projects we have completed included one for a organisation which had circa 30 offices around Australia.
We make this process seamless for the business and end users. We also offer cloud based O365 backups of mailboxes and Sharepoint / Onedrive.