I'm looking for advice for archiving an Exchange Online Archive mailbox, or at least getting an understanding of what are current best practices for my scenario. We have on-premises Exchange 2010. I have 2 Exchange servers, one with the users' primary mailboxes and one with users' archive mailbox. Up to this point, we've continued to use PSTs (as we are still using Office 2007). We're finally moving to Office365, so I get to start getting rid of PSTs. However, I'm concerned about addressing the data of terminated users. Currently, we simply export all content from the terminated user's mailbox to a PST and then we put all PSTs for that terminated user into a shared drive that the supervisor can access (assuring access to important content). With Exchange Online Archive mailbox, I'd like to know what people do to keep content available. I could disable the account, move all data to the Archive mailbox, and then give access permissions to the necessary parties. That seems like a good way to waste space on the server, but perhaps necessary? I could export the content to a PST, but then we're still stuck with PSTs. I could move the content to Exchange in the Cloud, but this seems like a licensing and access mess. I could move all content to the supervisor's mailbox, but then that could create a very bulky email environment for the supervisor.
Anyhow, you get the idea. What is the best way to deal with this scenario?
Oh, one other thing... Has MS brought back the ability to use Archive (or similar) to easily archive by date? That works great now, UNTIL you enable Online Archive for a user's mailbox.
I appreciate any assistance.