Turning Off Cached Exchanged Mode
This KB explains how to fix an email account if it is not displaying any emails in the Outlook program on a Laptop with VPN.
THIS SHOULD ONLY BE TRIED ON A LAPTOP, THIS WILL NOT WORK ON A DESKTOP
Step 1: Click File > Account Settings > Account Settings
Step 2: Click on the Email Account under the Email Tab (There should only be one email), then click Change.
Step 3: Under Offline Settings, uncheck Use Cached Exchange Mode.
Step 4: Exit, and then restart Outlook.