I used the GPO in my domain controller to set my server firewall - domain outbound block except allow all Core Networking of File and Printer Sharing rules.
After I set this up, I use gpupdate /force on my server to update my firewall on the server. That works well.
Subsequent gpupdate /force on my server no longer work.
It seems I might have stopped some outbound rules that is necessary for GPO update to work.
Is there any way I can change my server to accept GPO update, since my firewall on server is under GPO now.