A user GPO does not process with security filtering applied

In case you have decided to apply a user group policy object based on security filtering such as a security group, you may notice that the user's in the security group that are the members do not get that policy applied. Here is a quick tip that you might need to check.

Make sure under the Delegation tab of that particular group policy object "Authenticated Users" have READ permissions, because when you remove this group from the Security Filtering section and add the desired security group, the behavior of the policy object changes and for the users to read this policy, you need to give them read access under the delegation tab by adding in the "Authenticated Users" group!

-Alstar