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You can configure OWA access to Enterprise Vault after you have set up your Enterprise Vault server for Exchange Server archiving. The instructions for configuring OWA access to Enterprise Vault assume that you have already configured OWA on Exchange Servers.
To provide OWA 2000 or OWA 2003 access, install Enterprise Vault OWA 2000 or OWA 2003 Extensions on front-end and back-end Exchange Servers. To provide OWA 2007 access, install the Enterprise Vault OWA 2007 Extensions on Exchange Server 2007 with Client Access Server (CAS) role installed.
All the Exchange Servers on which you install the Enterprise Vault OWA Extensions should be at the same Exchange Server service pack and hotfix level.
When you install the Enterprise Vault OWA Extensions on your Exchange Servers, ensure that you install the same Enterprise Vault release version of the extensions on all the Exchange Servers.
The following are additional requirements for accessing Enterprise Vault from OWA clients:
If you are running Enterprise Vault on Windows Server 2008, then the following Role Services must be installed for the Web Server (IIS):
In addition, the option IPv4 Address and Domain Restrictions in Feature Delegation must be set to Read/Write. To find this option, open Internet Information Services (IIS) Manager and click the server object in the navigation pane. Open Feature Delegation and ensure that IPv4 Address and Domain Restrictions is included in the listed options.
When using the Enterprise Vault OWA 2007 Extensions, 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.
For more information about domain functional levels, see "Domain and forest functionality" in the Help and Support Center for Windows Server 2003.
Instructions on how to set up constrained delegation are given in the manual Setting up Exchange Server Archiving.
The following are required on each Windows 2003 Server on which you will install the Enterprise Vault OWA 2003 Extensions:
As Enterprise Vault OWA 2003 Extensions modify OWA control files on Exchange Server 2003, the version of these files must be one that is supported by Enterprise Vault.
See Exchange Server OWA control file versions in the Enterprise Vault Compatibility Charts.
Before you install an Exchange Server hotfix that changes the OWA control file version, check in the Compatibility Charts that the version is supported by Enterprise Vault.
If the back-end Exchange 2000 server computer is running Windows 2000, Windows 2000 Service Pack 4 or later is required.
MSXML is required on Exchange Servers (with the exception of front-end Exchange 2000 servers). MSXML is installed automatically with Internet Explorer 6.0 and later.
On user desktops, Internet Explorer 6.0 or later is required to support the full functionality available with OWA 2003 and OWA 2007 clients.
Note that the Enterprise Vault buttons are not available in OWA 2000 clients, which means that you can only view archived items. To be able to archive, restore, and delete archived items from your OWA client and have integrated access to Archive Explorer and Search features, you need to use OWA 2003 or OWA 2007.