132 votes52 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!
Where is the "Clean up mailbox"? Under old interface it was under Settings -> Mail -> Options -> Clean up mailbox.FS supported this idea ·