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I have a Server 2008 R2 Domain with quite a few Group Policy Objects that should be applied to various OUs and security groups (Using security filtering).
I got reports from users that they were missing certain settings and things like mapped drives. When I started investigating the problem, I found that almost every single GPO in our domain has simply stopped being applied.
There are a few GPOs (Like the default domain policy) that are still being applied, and it looks like the one thing they have in common is that these policies are all applied to the 'Authenticated Users' builtin group. Whereas all other GPOs use security filtering on various other security groups.
I have run lots of RSOP tests (Planning and Logging) which both show that only the GPOs applied to 'Authenticated Users' are being run. The other GPOs don't even show up under the "GPOs that were not applied ..." section of gpresult. I have checked permissions, GPO inheritance, and a few other basic but common GPO problems, all of which seem fine. I tried creating a some brand new GPOs, and applying them to brand new security groups, however these were also not applied.
I have not noticed any other issues with Active Directory, authentication against these security groups for other functions (such as file permissions) all seem to be working as expected.
I'm at a total loss to explain why these GPOs just suddenly stopped getting applied, for no apparent reason. Does anyone have any ideas what might be going on, or how to continue troubleshooting?