I have trawled the internet all day without finding a solution to this one.
When my Default Web Site (IIS) is running, I get the following error 6 times every half hour in the Application Log.
(Process w3wp.exe, PID xxxxx) "RBAC authorization returns Access Denied for user <DOMAIN>/Domain Controllers/<SERVER NAME>. Reason: No role assignments associated with the specified user were found on Domain Controller <SERVER NAME>
As far as I can see, I have no scheduled tasks running every 30 minutes, so I cannot even work out what is triggering the error.
I have seen various posts about backup permissions, but my scheduled backup is running in the <DOMAIN>\Adminstrator account, and that account is in the Exchange "Organisation Management" group, so this does not appear to be related to the problem.
Can anyone throw any light on this / help me solve the problem?