131 votes51 comments · The new Outlook on the web (Office 365) » Mail · Flag idea as inappropriate… · Admin →
Hey, thanks for your feedback! This option will be added back to OWA in the next couple months. We’re working on improving the service that powers Clean Up, and then we’ll add this option back!
Cannot locate option for "Clean up mailbox" - this is required since MS Made these changes:
We need to cleanup some mailboxes every 2nd day otherwise they reach their quota and stop working