Messaging offers mailbox licenses for Basic and Mainstream users.
Basic: Provides the basic call answering and voice messaging functionality.
Mainstream: Provides the full functionality of the Messaging system that includes call answering, voice messaging, Reach Me, Notify Me, Fax support, Speech based features, and IMAP access to the Avaya message store.
Administrators can mix the Basic and Mainstream seat licenses on the Messaging system.
Messaging offers a cost effective licensing model as customers who want only the Basic messaging features can purchase lower cost Basic mailbox licenses. Customers who want advanced capabilities can purchase the Mainstream mailbox licenses.