Several Office Communications Server 2007 R2 components require IIS. For details, see Internet Information Services (IIS) Requirementsin the Planning and Architecture documentation.
The following versions of IIS are supported for Office Communications Server:
- IIS version 6.0 running on Windows Server 2003
- IIS version 7.0 running on Windows Server 2008 in IIS 6.0
Note: For details about which features to enable in IIS 6.0 compatibility mode, see in Deploying Communicator Web Access in the Deployment documentation.