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:

  1. Close OfM
  2. From the Finder select the Go menu
  3. Hold down the Option key and Library will appear
  4. Select Library
  5. Navigate to ~/Library/Caches/Outlook/Main Identity/#
  6. Delete out all the folders under Main Identity
  7. Open OfM, give it about 5 minutes to start downloading the GAL