Add AD user to admin group

[m.traeumner (Michael Träumner)]

Perhaps @davidep has an idea.
I think the problem is similar to this:

2 ns 7.6, each with user administrator both part of domain_admins but only one has full access to the ui

2 ns 7.6, each with user administrator both part of domain_admins but only one has full access to the server manager interface. What up with that?