Backing up Office 365 user's Exchange Online mailbox for offline review and archiving?

Frequent Contributor

What's the best method for me to be able to backup/archive another user's Exchange Online mailbox (including their Recover Deleted Items secondary storage area), without interrupting their access to their active mailbox? I have a user that I need to get a reviewable PST of their mailbox,

2 Replies

Why exactly do you need a backup though? PSTs are unreliable and insecure, I would strongly suggest avoiding them where possible.