Presence Server provides for a centralized point for unified presence services across Avaya and third party endpoints registered to the Avaya solution. It allows for integration to other platforms such as Microsoft Lync, IBM Sametime, and Goodle Talk to allow for cross platform messaging and presence. Much like Session Manager and System Manager, it is avaliable as virtualized server on the Midsize Enterprise Server, as a physical Avaya server, and a virtual server on customer provided hardware.
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