Access denied after login to Management Console via SSO

After solving the exception I got logging in with SSO, I got another problem. Exception after Login via SSO

(The other topic didn’t seem to be very clear, so I opened up a new one. It’s a new problem after all.)

If I login to my Main DC via SSO I get the message “Access denied You don’t have the needed privileges to access this application. Please contact the administrator if you find this to be incorrect.”.

The users this happens with, already are Administrators. This problem doesn’t appear by logging in directly to the server without using SSO.

If I open the management console of another server (backup DC or member sever), the login with SSO works just fine.

Any idea, how I can gain access to my main DC by using SSO?

Has nobody any idea?