Migration of OneDrive in ODM returns an error:
"OneDrive does not exist in the source tenant. Nothing to migrate."
Previous migrations have been successful.
Recent changes to the Source UPN, such as a domain transfer/move.
ODM will query the Source OneDrive using:
https://graph.microsoft.com/v1.0/users/{userPrincipalNameOrId}/drive
When ODM runs this to the Source user, it returns a 404 not found.
You can receive the same error when running this in Graph API explorer.
Microsoft made changes that have caused this issue to occur.
Waiting 24-48 hours after switching the domain usually resolves this.
