Moved Domain, Now Source M365 users show up as GUID for email address and in ODM the users show up as unlicensed even though they were previously migrated.
This appears to be an issue with the M365 resolution of the accounts.
In M365 update an attribute like description.
In ODM Accounts
Select the affected accounts
Run "Refresh Selected Accounts"
This should update the information to Username@domain.onmicrosoft.com