[This is pre-release documentation and subject to change in future releases. This topic's current status is: Milestone-Ready]

Topic Last Modified: 2010-07-18

Microsoft .NET Framework 4.0 is required for Microsoft Communications Server 2010. Setup prompts you to install this prerequisite, and it automatically installs it if it is not already installed on the computer

If you install Communications Server 2010 by using the command line, you need to manually install this prerequisite on the server.

Communications Server 2010 only supports the 64-bit edition of the .NET Framework.

Communications Server 2010 supports .NET Framework version 3.5 Service Pack 1. After installing the .NET Framework 3.5 SP1 package, you should immediately install the following updates: