Setting up Office 2021 via GPO can be quite the puzzle—I've navigated similar challenges with deployment scripts in the past. When I upgraded to Microsoft Office Professional, I encountered some script frustrations too. What eventually worked for me was diving deep into the configuration file and double-checking network permissions. Sometimes, it's the smallest detail causing the hiccup! Hang in there, and hopefully, someone here can chime in with a solution that clicks perfectly for your setup. It can be a bit of trial and error, but once it's up and running smoothly, it's a game-changer for productivity!