Install Windows Server 2008 or a later version.

• Exchange 2010 Prerequisites
  
  
• Installing Windows Server 2008 R2
  
  

Prerequisites:

• Install Microsoft .NET Framework 3.5 Service Pack 1 (SP1).
  
  
• Install the Microsoft .NET Framework 3.5 Family Update for Windows Vista x64, and Windows Server 2008 x64 updates.
  
  
• Install Windows Remote Management (WinRM) 2.0 and Windows PowerShell V2 (Windows6.0-KB968930.msu).
  
  
• Install the Microsoft Speech Platform - Server Runtime (Version 10.1) (SpeechPlatformRuntime.msi).
  
  
• Do one of the following:
  
  
  • If you've installed a version of Communications Managed API 2.0 other than the UCMA Core Runtime on a Client Access server in your Exchange organization, you must also install the OCS 2007 R2 Web Service Provider Hotfix KB 981256.
    
    
• If you haven't installed a version of Communications Managed API 2.0 on a Client Access server in your Exchange organization, you must install the Unified Communications Managed API 2.0, Core Runtime (64-bit).
  
  

• Microsoft .NET Framework 3.5 Service Pack 1
  
  
• Microsoft .NET Framework 3.5 Family Update for Windows Vista x64, and Windows Server 2008 x64
  
  
• Windows Management Framework Core package (Windows PowerShell 2.0 and WinRm 2.0)
  
  
• Microsoft Speech Platform - Server Runtime (Version 10.1)
  
  

• OCS 2007 R2 Web Service Provider Hotfix KB 981256
  
  

• Unified Communications Managed API 2.0, Core Runtime (64-bit)
  
  

Download Exchange 2010 Service Pack 2 (SP2).

Download SP2 for Exchange Server 2010

Run Setup.exe to install SP2.

Upgrade Exchange 2010 to Exchange 2010 SP1, SP2 or Exchange 2010 SP3

Download and install the required Exchange 2010 SP2 Unified Messaging language packs on the UM server.

• Exchange Server 2010 SP2 UM Language Packs
  
  
• Install a Unified Messaging Language Pack on a UM Server
  
  

Add the Unified Messaging server that's running Exchange 2010 SP2 to a UM dial plan.

Add a UM Server to a Dial Plan