The Enterprise Vault functionality for Lotus Notes and DWA is provided by design changes to the mail file. These design changes are applied using revised mail templates.
For Domino mail file users you can configure the following Enterprise Vault client features:
Enterprise Vault extensions for Lotus Notes.
If you want users to have the full Enterprise Vault client functionality available, you need to install the Enterprise Vault extensions for Lotus Notes on all the target Domino mail servers.
Enterprise Vault extensions for DWA.
If you want users to have the Enterprise Vault client functionality available in their DWA clients, you need to install the Enterprise Vault extensions for DWA on all the target DWA servers.