Manually Update Global Address List (GAL) via Microsoft Exchange Powershell
This will be a short post but I thought I would post this as I have had to use this recently while updating the Global Address List.
This can be completed by using the below command –
Update-GlobalAddressList -Identity “Default Global Address List”
This will proceed to update the Global Address List entries as per the below screenshot –
You may receive the above messages that state that the above mailboxes are invalid. These are Microsoft Exchange System Mailboxes so they will not be populated on the GAL.