Update a Global Address List
You can update the default GAL like so: Update-GlobalAddressList ‘Default Global Address List’ If you want to update ALL address lists: Get-GlobalAddressList | Update-GlobalAddressList Update-OfflineAddressBook “Default Offline Address Book” Update-FileDistributionService %replace with the name of your mailserver% Get-OfflineAddressBook | Update-OfflineAddressBook Get-GlobalAddressList | update-GlobalAddressList Get-AddressList | update-AddressList