Disabling the AddNewRequestsTentatively option is no longer possible for User/Shared mailboxes
​Another one in the series of ‘blog this so I won’t forget about it later’ 🙂 So, apparently, it is no longer possible to configure the AddNewRequestsTentatively parameter on regular mailboxes. This option makes any new meeting request you receive to appear Tentatively in your calendar. Here’s the description we have …