Topic Last Modified: 2010-07-18
Microsoft Communications Server 2010 supports a single forest or multiple-tree forest domain topology. This topic describes the requirements for Active Directory Domain Services (AD DS).
Supported Domain Controller Operating Systems
Communications Server 2010 supports the following operating systems:
- Windows Server 2008 R2
- Windows Server 2008 with Service Pack 1 (SP1) or later
- Windows Server 2003
Forest and Domain Functional Level
All domains in which you deploy Communications Server 2010 must be raised to a domain functional level of at least Windows Server 2003. You cannot deploy Communications Server 2010 in a Windows 2000 mixed or Windows 2000 native domain.
All forests in which you deploy Communications Server 2010 must be raised to a forest functional level of at least Windows Server 2003.
Support for Read-Only Domain Controllers
Communications Server 2010 supports Active Directory Domain Services deployments that include read-only domain controllers or read-only global catalog servers, as long as there are writable domain controllers available.