I have a specific issue and searching cannot see anything similar.
We have a windows 2008r2 domain (yes i know and i am planning on upgrading this).
We have workstations running Windows 10.
Now if i create a user GPO and link it to an OU which the user sits in. The workstations do not seen to apply it. It shows as it should be applyedwhen doing the GPO modelling, but when looking at the results it doesn't apply.
Replication is fine between the DCs, permissions look fine.
However if I link the same GPO to the domain root instead it applies fine.
Is there any known issue with GPOs linked to OU's that would cause this not to work.