Applies to: Exchange Server 2007 SP1, Exchange Server 2007 Topic Last Modified: 2007-10-30

Cluster continuous replication (CCR) on Windows Server 2003 requires a quorum model called the Majority Node Set (MNS) quorum with file share witness. This quorum model is available in Windows Server 2003 Service Pack 2 (SP2), which is required for Microsoft Exchange Server 2007 Service Pack 1 (SP1).

To use the MNS quorum with file share witness with the release to manufacturing (RTM) version of Exchange Server 2007 and Windows Server 2003 SP1, you must install the hotfix described in Microsoft Knowledge Base article 921181, An update is available that adds a file share witness feature and a configurable cluster heartbeats feature to Microsoft Windows Server 2003 Service Pack 1-based server clusters. The hotfix must be installed onto each node prior to deploying CCR.

Important:
This procedure should be performed only on computers running Windows Server 2003 SP1.

 Before You Begin

To perform the following procedure, the account you use must be delegated membership in the local Administrator group. For more information about permissions, delegating roles, and the rights that are required to administer Exchange 2007, see Permission Considerations.

 Procedure

 To install the hotfix documented in Knowledge Base article 921181

1. Download the hotfix package as detailed in Knowledge Base article 921181, An update is available that adds a file share witness feature and a configurable cluster heartbeats feature to Windows Server 2003 Service Pack 1-based server clusters.

2. Copy the downloaded package to each node that will participate in the cluster.

3. Double-click the downloaded package to install it.

4. Restart each node for the change to take effect.

 For More Information

For more information about the file share witness, see Cluster Continuous Replication.