This may be related to Q_24382549 but our DC is throwing up an error when we try to look at the member list for the Administrators Group. The message is "Some of the object names cannot be shown in their user-friendly form. This can happen if the object is from an external domain and that domain is not available to translate the object's name"
Clicking on ok lets you view the members but there is an unresolved SID with a CN=ForeignSecurityPrincipals
Now - this is a closed domain - no inter-domain trusts / relationships with other domains. There is a primary DC with most of the master roles and a secondary backup DC - virtual server on ESXi.
The administrators security group is not accessible by other servers, for example when trying to add the group in security permissions it just doesn't show up in the list of available names / groups etc. If you do an advanced search on names starts with "admin" it comes back with just the Administrator user account.
However - if you search on the DC itself or from a client pc using the ADToolsPack then it can at least find the Administrators group.
Profile folders have stopped working and when client pcs log on to the domain they get a message warning that the user profile cannot be loaded because there are insufficient security rights to the folder. You can't add the domain administrators group to the security permissions for the respective profile folder because it can't be found !
Any one got any ideas what is going on ?