I went through some GPO documentation and it seems really straigforward but I'm still stuck, I have a OU called Users and I created a GPO that simply mapped a drive for a single user and I applied it to the OU called Users with a security filter for only that user (also when I enter in the name of the user I always check the name via the button on the right), the thing is when I do a GPresult /r it shows that the GPO is not applied to computer when the user is logged in and there is no drive mapping still, anything I do with specific users related to GPO's do not work, the only I know how to get working is computer policies and applying to authenticated users (basically everyone) or applying to specific computers through the security filter. Any ideas on what I can try? thank you for time!
There was an update in June 2016 that results in the situation that if you remove the Authenticated Users from the security filtering you can run in to trouble if the required systems cannot read the policy.
To fix this simply go to the Delegation tab of the policy and add the Authenticated Users with Read permission. Not read and apply, check what you've done with the advanced button.