Server not applying GPOs

[CHiLL]

We have a newly created Server 2022 21H2 for our updated Cunninghams cashless catering system. It's all up and running, though I've noticed some odd behaviour on the server. For example, I cannot RDP to the server and I get UAC prompts when logged in as a domain admin and run Powershell...despite both RDP being turned on and UAC being turned off by the servers GPO. The server is in the same OU as all other non-DC servers and has the same policies applied. I've performed an RSOP and I can see that the server has received and applied the necessary policies...however they just don't seem to be actually applied. I've also dropped the server from the domain, deleted the AD account and re-joined it...and it's still doing the same thing.

 

Has anyone had this behaviour before?

[TRSJon]

Not sure on the UAC prompt, but i've seen the RDP issue where allow RDP hasn't been switched on in the firewall to allow access.