Windows 2012 R2 domain with 2012 and 2008 member servers. In the last couple of days I'm seeing various permissions issues affecting domain admins.
UAC control is asking for username and password when popping up - continues fine once the details are given, but as a domain admin this would normally just show the UAC notification without asking for account details.
Access to various admin shares is requiring entering of username and password.
Security logs on a number of servers are inaccessible - access denied.
dcddiag shows everything fine. Have run netdom verify on the affected member servers - all ok. Nothing of interest in the logs - although can't get into the security logs as mentioned.