For an Office 365 tenant to tenant migration, I wrote a small Powershell-script with the Sharegate API in order to fully migrate all necessary site collections from A to B.
The script will run on a VM, making it easy to keep migrating during and post business hours.
Be my guest to re-use the script and to make your migration run smoothly and without much manual interference. The script will traverse 3 steps:
- Create the site collection at the destination tenant
- Make your account a site collection administrator
- Migrate the site collection and its content
After every third site that is migrated, the script will prompt for manual continuation. You can easily remove this part or increase the number of sites migrated to your use case.