In other words... no deletion should happen automatically via "Age limit for retention (days)" however, if a user manually deletes anything, it should always be available in "Recover Deleted Items..." i.e. "Delete and Allow Recovery"
It should be the default for all mailboxes all the time...
Do I need an RPT, or a DPT? Do I need to specify a policy, or the DPT will kick in automatically since setting no policy makes all the mailboxes "untagged" etc...