On servers running Windows Server 2008 R2, Windows PowerShell 2.0 is automatically installed with the operating system.

On servers running Windows Server 2008 SP2, you must make sure that Windows PowerShell 2.0 is installed. If not, you must install it. Before doing so, you must remove any previous versions of Windows PowerShell that are installed on the server.

To install Windows PowerShell 2.0 on a server running Windows Server 2008 SP2, see the Microsoft Knowledge Base article 968929, "Windows Management Framework (Windows PowerShell 2.0, WinRM 2.0, and BITS 4.0)," at http://go.microsoft.com/fwlink/?linkid=197390.

The 64-bit edition of Microsoft .NET Framework 3.5 with SP1 is required for Microsoft Lync Server 2010. Setup prompts you to install this prerequisite, and it automatically installs it if it is not already installed on the computer. .NET Framework 4.0 can be installed on the same computer as well, but does not take the place of .NET Framework 3.5 with SP1, which is the required version for Lync Server 2010.

Note:
If you install Lync Server 2010 by using the command line, you need to manually install this prerequisite on the server. To manually install it, download the Microsoft .NET 3.5 Service Pack 1 (Full Package) from the Microsoft Download Center at http://go.microsoft.com/fwlink/?linkid=197398.

Updates to Microsoft .NET Framework 3.5 with SP1

After installing the .NET Framework 3.5 SP1 package, either manually or using Lync Server setup, you should immediately install the following updates:

Note:

Microsoft Knowledge Base article 959209, "An update for the .NET Framework 3.5 Service Pack 1 is available," at http://go.microsoft.com/fwlink/?linkid=197396, which addresses a set of known application compatibility issues. Download "Update for .NET Framework 3.5 SP1 (KB967190)" from the Microsoft Download Center at http://go.microsoft.com/fwlink/?linkid=197397, which addresses a file association issue for XPS document.

Microsoft Lync Server 2010 uses Windows Installer technology to install, uninstall, and maintain various server roles. Windows Installer version 4.5 is available as a redistributable component for the Windows Server operating system.

Download Windows Installer 4.5 from the Microsoft Download Center at http://go.microsoft.com/fwlink/?linkid=197395.

Front End Servers and Standard Edition servers must run Internet Information Services (IIS), with the following modules:

• Static Content
  
  
• Default Document
  
  
• HTTP Errors
  
  
• ASP.NET
  
  
• .NET Extensibility
  
  
• Internet Server API (ISAPI) Extensions
  
  
• ISAPI Filters
  
  
• HTTP Logging
  
  
• Logging Tools
  
  
• Tracing
  
  
• Windows Authentication
  
  
• Request Filtering
  
  
• Static Content Compression
  
  
• IIS Management Console
  
  
• IIS Management Scripts and Tools
  
  
• Anonymous Authentication (This is installed by default when IIS is installed.)
  
  
• Client Certificate Mapping Authentication
  
  

All Front End Servers and Standard Edition servers where conferencing will be deployed must have the Windows Media Format Runtime installed. The Windows Media Format Runtime is required to run the Windows Media Audio (.wma) files that the Call Park, Announcement, and Response Group applications play for announcements and music.

We recommend that you install Windows Media Format Runtime before you install Lync Server 2010. If Lync Server 2010 does not find this software on the server, it will prompt you to install it and then you must restart the server to complete installation.

To install the Windows Media Format Runtime on servers running Windows Server 2008 R2, use the following command:

%systemroot%\system32\dism.exe /online /add-package /packagepath:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.1.7600.16385.mum /ignorecheck

To install the Windows Media Format Runtime on servers running Windows Server 2008, use the following command:

%systemroot%\system32\pkgmgr.exe /quiet /ip /m:%windir%\servicing\Packages\Microsoft-Windows-Media-Format-Package~31bf3856ad364e35~amd64~~6.0.6001.18000.mum

If you are deploying Monitoring Server or Archiving Server, your Front End Servers and Standard Edition servers must run Message Queuing. Message Queuing is an optional feature in Windows Server 2008 R2 and Windows Server 2008 SP2.