Check whether Outlook and the computer can access the Offline Address Book file on the server.

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Microsoft has a good support article for troubleshooting the OAB in an Office 365 environment located here.

Of particular interest is section 6 on testing the autodiscover service: “Step 6: Determine whether the autodiscover service is working, and check access to the Offline Address Book Note: If the Offline Address Book issue wasn’t resolved by using steps 1 through 5, follow this step for validation before you call Support.

The Outlook Client failed to download an updated copy of the Offline Address Book because the services have stopped functioning.

The Global Address Book (GAL) is a directory of available contact information for UAEX employees.

Updating the OAB is also possible through the Power Shell console …

via the command As a fallback you can add the Synchronizer users to the addressbook of the Sync User through the OWA (Outlook Web Access).

Specialties: Office 365, Lync, Windows Intune, Windows Server 2003/2008/2012, WSUS, Backup Exec, Microsoft Distributed File System and Namespace.

Written by Thomas Speekenbrink Overview: In the Technical settings you have retrieved the settings, both the EWS as the OAB. The OAB test returned a 404 / 403 Unauthorized error.

someone who just received a UAEX Exchange account use the steps below to synchronize your computer's locally cached version of the GAL. The most recent version of the Global Address List will be downloaded.

You may see a status window indicating the download's progress, it will automatically disappear when completed. Re-open Outlook and log in; the Global Address List should now contain the most recent information.

To do this check, sign in to the Office 365 portal, and then follow these steps: Information Technology professional with Tec Fac Business Services Group.