Very nice that life give your some new challenges. In may lap I some how ran into below error.
Error Message: A Management group with the same name is already registered to the data warehouse mangement group.
I use Get-SCDWSource(Syntax) to check what and how the value has been set.
Then I saw the result as below.
Now I have to unregister the MG01 group. Here I use Unregister-SCDWSource(Syntax) to remove the group.
Now I was able to run the ‘Register with Service Manager Data Warehouse’.