#Prepare for Migrations

Before performing Google Drive migrations in Fly, follow the instructions below to prepare the source and destination environments for the migration.

1. Build the inventory on your source Google Drive environment.

   • Number of user accounts

   • Size and structure

   • Other file storage locations

2. Set up Microsoft 365 services and configure your Microsoft 365 subscription.

3. Add and verify the domain

4. Configure application settings

   Refer to for details.

5. Fly does not automatically provision new users in Microsoft 365. Make sure the destination users already exist before the migration.

   There are different ways to add new Microsoft 365 users:

   • Adding users individually. See instructions .

   • Adding users in bulk. See instructions .

   • Adding users via PowerShell. See instructions .

   • Synchronizing users from local Active Directory to Microsoft 365 via Microsoft Entra Sync or Microsoft Entra connect. See instructions .

6. If you want to migrate content to site collections of the Microsoft 365 Multi-Geo tenant, make sure the corresponding site collections have been created in the destination and the custom script is allowed on the destination site collections.

7. (Optional) Pre-provision OneDrive for users

   If you want to migrate content to OneDrive, make sure the corresponding OneDrive has been created. Refer to for details.

8. (Optional) External User migration

   External users cannot be migrated in the migration. Make sure the external users have been created or imported in the destination tenant before the migration. Then you can map the source external users to the destination users in the migration.