In Exchange Server 2007 and 2010 environments, Outlook in RPC over HTTP mode is called Outlook Anywhere. To support Enterprise Vault requests from Outlook Anywhere clients, no Enterprise Vault extensions are required on the Exchange CAS computer. However, you need to configure RPC over HTTP access on the Enterprise Vault server.

Outlook on users' computers needs to be configured to use RPC over HTTP, and the Enterprise Vault Outlook Add-In needs to be installed on users' computers. See the Setting up Exchange Server Archiving manual for instructions.

See Prerequisites for RPC over HTTP with Exchange Server 2003