retention time and 'removed' mailbox status

hi,

I have a couple of general questions: 

1) How do I check the default retention time for removed mailboxes in exchange power shell ?  The reason I'm asking is I've marked for deletion a few user mailboxes. But it happened I had to re-enable accounts in AD as 2 of the employees returned to the company. The mailboxes seem to have connected automatically back since I re-enabled accounts in Active Directory. Not sure whether they are still in status 'marked for deletion' ? 

2) How do I force to cancel the deletion if it happens to be the case ?

thank you.