Front users

Afternoon! Is it at all possible to access a user’s mailbox from the administrative level? Example: I’m Customer service Director & have multiple emergency call outs today. For whatever reasons I want to look at these users mailboxes. I do not have their credentials, but am an admin on Front app. I understand you can grab assigned conversations from anyone at anytime and assign to someone else, but would that be all we can manipulate from a user who is not here? I also know you can add a user mailbox to your own account, but you need credentials for that to set up 365 with their account. Front also emails reset pw links to emails so resetting a pw is not an option either.   Thanks a lot!