We have a client with approximately 1000 mailboxes on our Exchange 2007 server.
They have just completed a migration of said mailboxes to Office 365.
They would like a backup of what we currently have on our Exchange 2007 server.
Q: They would like me to recommend a method for the backup and how they will be able to recover a mailbox in the future (should they need it).
What should I recommend?
I am familiar with using Powershell to Export mailboxes in bulk to a PST (in fact I tested it on 10 mailboxes and it does work fine).
But it seems a tad slow.
Is there something better than that?
Thank you for your time.