For customers wanting to take advantage of the hybrid model for migrations or coexistence, Microsoft is now offering a Hybrid Server license free of charge. The Hybrid server is not a custom version of Exchange, but one with CAS and Hub roles for Exchange 2010 and CAS and Mailbox roles for Exchange 2013. Mailboxes are not allowed to be hosted on this server and its only role is as a middle man in a hybrid deployment to Office 365. Continue reading “Free Exchange Hybrid Server License for Office 365”