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Microsoft® Lync Server 2010 Unleashed by Tom Pacyk, Andrew Abbate, Alex Lewis

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Standard Edition Versus Enterprise Edition

In previous versions of Office Communications Server, an administrator had the option to deploy both Standard Edition and Enterprise Edition Directors, which caused some confusion around deployment methods and licensing. In Office Communications Server 2007, multiple Directors could be deployed either as an array of multiple Standard Edition Front Ends, or as a pool of multiple Enterprise Edition servers with a dedicated back-end SQL server database. Office Communications Server 2007 R2 simplified these options, and the only option for Director high availability was a pool of Enterprise Edition servers. This model was problematic because a pool of Directors created its own databases, which matched the ...

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