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The following configuration shows a simple OWA 2007 environment.
In this configuration Enterprise Vault OWA 2007 Extensions are installed on the same computer as Exchange Server 2007 with Client Access Server (CAS) installed. Typically, Exchange Server 2007 with Mailbox Role would be on a separate computer, but it could be co-located with the CAS server.
If the mailboxes being accessed are located on a server which is separate from the CAS computer, and users are authenticated to OWA using Integrated Windows Authentication (IWA), then it is necessary to configure constrained delegation. Configuring constrained delegation requires a domain functional level of Windows Server 2003 or later.
When a user starts Archive Explorer or an archive search from the OWA client, the client will always try to connect directly to the Enterprise Vault Web Application on the Enterprise Vault server.
If clients connect to the Exchange 2007 CAS server using Microsoft ISA Server, then the Enterprise Vault Web Access application must be published by the ISA Server in addition to the Exchange 2007 CAS server.
See Using ISA Server with Enterprise Vault.
The Exchange 2007 CAS server connects to the Enterprise Vault server using anonymous authentication. On the Enterprise Vault server, the Data Access account is configured to manage the anonymous connections.
