I'm running Sharepoint 2010 in a simple 1 App and 1 DB server setting. I am using AD to control access to sites. All the SP groups are Domain Local security groups which contains users, and then the security group is added to the site in SP where it will grant access.
Nothing has changed recently but I'm noticing that some of these groups are not working as they should. Our SP environment is not down, because 90% of the groups that grant permissions in AD for SP are working but there is 10% which seems to not be. I can't fathom why this is but if I add a user to one of these groups, then nothing happens. If i add the same user to one of the working groups, permissions work fine.
The change is nearly instant from when I add a user to a working group to when it takes affect. Even then, I looked around and find this which kind of gets near the issue. http://sergeluca.wordpress.com/2013/07/06/sharepoint-2013-use-ag-groups-yes-butdont-forget-the-security-token-caching-logontokencacheexpirationwindow-and-windowstokenlifetime/
talks about cache timeouts and such so I did the commands to lower the cache timeout to 10min instead of 10hrs; still did not work.
I don't see any errors in logs, I don't get any errors for authentication and I've done user synch successfully.
Can anyone please give me some leads that I can look at which could explain this wacky issue I'm seeing?