Log on to the evaluation version of Standard Edition server as a member of the Administrators group.

Start Server.msi by using one of the following two methods:

• Start the Office Communications Server 2007 R2 Deployment Wizard. Under Upgrade from the Evaluation Version, click Install.
  
• At a command prompt, change the default folder to the installation folder or the Setup\amd64\setup folder of the installation CD. At the command prompt, type the following command as described in Overview of the Upgrade Process:
  
  MsiExec.exe /i Server.msi EVALTOFULL=1 [/l*v <Drive:\Directory\FileName.log>] [/q[n|b|r][+]]

  For example:
  
  MsiExec.exe /i Server.msi EVALTOFULL=1 /l*v C:\Upgrade.log

Follow the instructions in the wizard to complete the upgrade.

Click Finish to exit the wizard.