Microsoft Office Communications Server Enterprise Edition - step-up license

Microsoft Office Communications Server delivers streamlined communications to help you find and communicate with the right person, in real time, from the applications you use most - like Microsoft Outlook messaging and collaboration client. Without expensive infrastructure and network upgrades, your organization can deliver these benefits on an extensible VoIP foundation. At the same time, your IT department can deliver these enhanced capabilities and provide operational control alongside your existing Exchange and Active Directory infrastructure.

An Enterprise Edition deployment consists of a one or more Enterprise Edition Servers connected to a separate, shared Microsoft SQL Server database that form an Enterprise pool providing IM, conferencing, and audio-video functionality. This two-tier architecture, delivers substantial improvements in availability, scalability, and performance over the Standard Edition.