We had the "Use Cached Exchange Mode for new and existing Outlook profiles" in a GPO set to disabled. We have since decided to allow users to decide whether to use cached exchange mode (for reasons I will not get into) and set this setting back to Not Configured several weeks ago. The Cached Exchange mode box in account settings is still grayed out in Outlook. To my knowledge this is not set in any other GPO, but I wouldn't swear to it. Any ideas on to let them choose?