I have two servers running Windows Server 2008 R2 Standard with SP1 which are experiencing the same issue. Both are VMs. Whenever I try to Add Roles through Server Manager or Powershell (any role) it fails with Access Denied. My domain account is a member of an AD group which is in the local Administrators group, so should have permissions to do this. I've also logged on with the local Administrator account, but it too is receiving an Access Denied error. This occurs whether accessing the server through RDP or through the VM console.
I've forced a GPUpdate and restarted but this had no impact. Other servers in the same OU don't have this issue so doesn't appear to be a Group Policy problem either. UAC is also turned off so shouldn't be interfering.
As a last resort we can rebuild the machines, but I'd much rather understand what has caused this error and find the resolution for it incase it happens again in future on a server we can't simply rebuild because it hasn't entered production yet.
- Edited by DaveP1985 Wednesday, April 29, 2015 12:10 PM