How to hide a Distribution Group from the GAL with Powershell
Here is a simple command that will save you some time. Instead of having to open up a GUI, you can just type this command in a PowerShell window and hide a Group from the GAL (Global Address List)
set-distributiongroup [GROUPNAME] -HiddenFromAddressListsEnabled $true
This will then hide the list from the GAL. No need to go into the GUI to get it done.
Great, that was exactly what I was looking for!