Prior to applying the policy I ticked the box, and I would expect that once it applied the tick would disappear and the box would become greyed out. However, it doesn't seem to be applying in Outlook.
I have therefore enabled this policy, and, using a test account, checked that it's applying on the client, which it appears to be as that key appears with a value of 0 (which I assume is correct? It's not entirely clear how the positives and negatives are applied in this policy as the name of the policy and the name of the registry key contradict each other) This count includes local folders that arent part of the online account. The GP setting appears to be Disable shared mail folder caching in Microsoft Outlook 2016\Outlook Options\Delegates, which sets registry key HKCU\software\policies\microsoft\office\16.0\outlook\cached mode\cacheothersmail 10,000 per profile across mail, calendar, contacts, tasks, and notes. Besides, iPhoto supports most common video file formats. It is a built-in app, so that no extra software is required. In addition to the function to copy iPhone photos to Mac, iPhoto also provides an easy way to transfer videos from iDevice to Mac (MacBook Air/Pro, iMac etc). I have tried unticking that option (download shared folders) in Outlook, and that does seem to do what we need. Export Videos from iPhone to Mac with iPhoto. We need the user's own mailbox to be cached for performance reasons, but it's less important that the shared ones are.
