Adding a Subdomain Problem




we have problem adding a subdomain to our environment. It is a ADFS enviroment and we have added the Domain always via PowerShell  -> New-MsolFederatedDomain.


If we add a specific subdomain we get the following error. 




Any other subdomain within the root domain works without any problems. 


What does this mean, has somebody setup a O365 environment and this is an unmanaged azuread with this subdomain and do we have to do an admin takeover ? We have found some blog posts about this. 


Many Greetings




1 Reply
best response confirmed by Vasil Michev (MVP)
Reply to myself ;) it is correct, if you have to make an admin takeover as described here. This works without any problems. Many Greetings Erik