The Messaging flexible storage capability offers two ways in which you can gain access to your voice mail.
Dual store: The Avaya message store is your storage destination for voice mail, and you use a different storage destination such as Microsoft Exchange for email.
Single store: You use the same external system for voice mail and email such as Microsoft Exchange.
These scenarios are not mutually exclusive. Administrators can configure Messaging to allow groups or individuals to use their preferred storage solution. When set up on the system, storage destinations are configurable on a per user basis.
If you use the Avaya message store as your storage destination for voice mail, you can unify your voice and email messages at the client level by setting up a separate IMAP4 Messages mailbox in Microsoft Outlook. Your voice mail then appears in a separate mailbox within Outlook. With this solution, you have the option to use Avaya one-X® Mobile to view voice mail in an email format on your mobile phone and gain access to your voice mail on a laptop from any location with Avaya one-X® Communicator.
If you use Microsoft Exchange as the storage destination for both voice and email messages, your voice mail appears in your Outlook inbox automatically. This is message unification at the server level. With this option, you can view your voice mail from any dedicated application on a smartphone, or from any location with Microsoft Outlook Web Access.