Researching Hosted Exchange (online) for a client (71 mailboxes). Question has come up as to why I would need to employ a Hybrid setup and what that cost might be. My understanding is a hybrid setup would be done if client had an exchange server on site previously and wanted to migrate those settings and mailboxes to the online exchange version while retaining the features. It would also grant more time to make the migration of the mailboxes to the online version. I would also need archiving to meet requirements for this client. The client currently has POP email hosted by another firm currently, do i even need to do a hybrid setup? The ongoing cost of exchange online would be a total of $497 per month. This would include $4.00 x 71 for the email boxes = $284 plus $3.00 for archiving x 71 users = $213 per month. Knowing the task will have a one time charge to migrate the email boxes. Can someone verify if I am missing something?