O365 will never empty deleted items by default from now

Hi,

So you have users that never delete anything from Outlook, and if they do they never clear out the Deleted items?

You now have a bigger problem:

http://blogs.office.com/2015/02/20/extended-email-retention-deleted-items-office-365/

MS are changing the default MRM Policy from 'delete after 30 days' to 'indefinite'. If you've changed this you're good, but hey, defaults ....