I have no idea if this is already addressed in 8.5
If you click 'Restore All' in your trash folder, you do not get a confirmation and all your trash is restored. Not much fun if you clicked it by mistake.
It can be really awful to have to rebuild a calendar that was accidentally deleted. Please make it possible to undelete them from trash!
I realize that there are some tricky process situations, but why restrict all calendar undeletes because of a few edge cases?
If an undelete ...
Add an option at the user mailbox level to make Restored documents Unread