I had this question after viewing
Group Policies on Windows 2008 R2 Domain Controller.
I read the above question and the comments. I am generally confused as to why all of my GPO policies is saying the same error. I will click OK and leave GPMC for a few and go back in and the error returns. I have made sure that all of the GUID folders in SYSVOL have no inheritance permissions set (removed those) and the only items I have in security filtering is "Authenticated Users". Delegation shows various admin groups and the Authenticated Users group as being (read from security filtering). I can't for the life of me get why this failure keeps coming up.
"the only items I have in security filtering is "Authenticated Users"" - this does not tell me what "authenticated users" may do. See if they have read permission on the policy and if nothing is denied.