Gal not updating
If the update mechanism appears to be broken for you, it could be because of a corruption in your OAB or in your mail profile.In that case, you can completely reset it by deleting the files making up the OAB or by recreating your mail profile.There might also be other third-party providers or third-party solutions that this article does not describe.Because Microsoft must respond to changing market conditions, this information should not be interpreted to be a commitment by Microsoft.Check whether Outlook and the computer can access the Offline Address Book file on the server.
You can disable the option “Download changes since last Send/Receive” to make sure you get a complete fresh copy of the OAB but this could take longer to download.Microsoft cannot guarantee or endorse the accuracy of any information or of any solution that is presented by Microsoft or by any mentioned third-party provider.Microsoft makes no warranties and excludes all representations, warranties, and conditions whether express, implied, or statutory.If the issue is resolved, it's unnecessary to continue to the next step.If the issue isn't resolved, proceed to the next step. To do this, ensure that you can view any changes in the GAL by using Microsoft Outlook Web App.
This solution is available through Microsoft or through a third-party provider.