Clustered OWA configurations

Figure: Clustered OWA 2000 or 2003 example gives an example of an active/passive cluster of Exchange Servers.

The following examples of clustering relate to OWA 2000 and OWA 2003 only. In an Exchange Server 2007 environment, the Exchange Server with Mailbox Role installed can be clustered, but the Exchange 2007 CAS server cannot. As it is the Exchange 2007 CAS server that contacts the Enterprise Vault server, the Enterprise Vault configuration is unaffected when Exchange 2007 Mailbox servers are clustered.

Figure: Clustered OWA 2000 or 2003 example

Clustered OWA 2000 or 2003 example

In this configuration, Enterprise Vault OWA 2000 or 2003 Extensions must be installed and configured on both Exchange Servers in the cluster. Enterprise Vault automatically adds the necessary cluster addresses to its configuration files when you configure the OWA Extensions. There could also be a front-end Exchange Server, but this would not normally be included in a cluster configuration.

When one Exchange Server in the cluster fails over to the other, connections to the Enterprise Vault servers are established automatically; users can continue to access items in their Enterprise Vault archives.

Figure: Configuration after failover

Configuration after failover