Get-UnifiedGroup WhenCreated field should reflect when the Unified Group was created and not changed when moved in backend.
Currently, Get-UnifiedGroup field WhenCreated is changed when the group is moved to a different back-end database by Microsoft. It should never change and should only show the date when the Unified Group was actually created.
Testing shows this is no longer an issue. The WhenCreated and WhenCreatedUTC attributes do not change when you run a New-MoveRequest cmdlet to change the back end database of a unified group.