Update Global Address: Leverage the Exchange Management Shell, a robust command-line interface based on Windows PowerShell technology, for streamlined automation of Exchange admin tasks. To manage every aspect of Exchange, including Update Global Address, utilize the Exchange Management Shell.

When prompted with this error “Update-GlobalAddressList’ is not a recognised” Ensure to follow these few steps:

Open Exchange Management Shell
Type in Add-PsSnapin Microsoft* and hit enter
Now type in Install-CannedRBACRoles and hit enter
And finally, run Install-CannedRBACRoleAssignments and hit enter
Now close EMS and reopen
Try typing the command one more time: update-GlobalAddressList -Identity “Default Global
Address List” -DomainController “yourdomaincontrollername”

This fix should correct the issue associated with GlobalAddresslist and make the list of end users available.

I hope you found this blog post helpful. Please let me know in the comment session if you have any questions.