You might need to install it as an administrator to avoid issues.
Note: Office 2013 and Office 2016 policies are only supported on Windows 7, Windows 8, Windows 10, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2 and Windows Server 2016. This method describes how you can set Group Policies for clients in a corporate Active Directory environment.
Aside from installing the policy templates for your Office version(s), you’ll need the Group Policy Management Editor (GPMC) or the Remote Server Administration Tools (RSAT) to edit and set the policies.
The admx templates in both packages are exactly the same.
When you downloaded the Office 2016 policy templates you must install them first.
I have implemented basic functionality, such as double-clicking the item to open it up (and in case of a recurring meeting to either open one or all of them): You can also right-click an item and select "Reply all with email" to create a new mail item with all recipients of the appointment (thanks Walter! Now you can delete appointments (whether one or multiple occurrences) directly from this pane, after a confirmation message is shown to the user: Synchronization is not 100%, so if you create or delete an appointment it will not automatically show up in the new list.