I didn't receive that when I setup my Production CAS servers or during any of the Dev install (using Powershell with ServerModule to load the Prereq features) but now I'm getting it on all. Just ...

Managing Microsoft 365 and Azure Active Directory resources efficiently often requires automation tools beyond standard admin ...

Before you can change an ACL, you must get the current one. There are two ways to do this with PowerShell. Learn how to get the current ACL and modify it.