@JillArmourThank you for sharing the resource link; it appears to be a valuable reference. When it comes to setting up Regional things with Group Policy, your steps make sense.
Starting with Group Policy Management, creating or tweaking a GPO is the way to go, and those screenshots really help make things clear. Just a quick note to double-check all the settings.
It's easy to miss something, and hitting F6 to make sure everything goes from red to green is a good call. and speaking of good calls, I also use Nakivo for Exchange backup - it's been a game-changer. Thanks for sharing these tips!