If you are using Microsoft Outlook to access your Exchangeaccount, you have access to the Global Address List (GAL). For configuration details, see Set up Outlook for macOS to access your IU Exchange account.
Outlook for Mac not updating GAL. Outlook for Mac not updating GAL. Occasionally Outlook for Mac (OfM) will stop updating the Global Address List (GAL) from Microsoft Exchange Server. To fix this issue to the following: Close OfM; From the Finder select the Go menu.
To search the GAL, choose one of the following options:
To improve results when searching the GAL, enter the last name followed by a comma, and then the first name. You can also search using an email username.