You can migrate (import) the contents of Outlook PST files (Personal Folder files) into Enterprise Vault. You also have the option of creating shortcuts in users' mailboxes, which they can open to go directly to the archived items.
Enterprise Vault provides Administrators with the following ways to migrate the contents of PST files into Enterprise Vault:
Wizard-assisted migration - If you have a small number of PST files, this provides a quick and easy way of migrating them to Enterprise Vault.
Scripted migration - This scripted migration facility is provided by Enterprise Vault Policy Manager. It is ideal for performing bulk migrations of PST files. It offers more flexibility than is available when using the migration wizard.
Locate and Migrate - This locates PST files on users' computers, copies them to a central location, and then migrates them. Locate and Migrate is designed to minimize the difficulties of collecting PST files from users' computers and is likely to require the least effort on your part.
Client-driven migration - It is possible for you to configure the Enterprise Vault Outlook Add-Ins so that users can perform their own PST migrations. The underlying mechanism that is used is Locate and Migrate, but users are able to queue their own PST files for migration. This can be useful if, for example, there are users with laptop computers who are in the office only one or two days a week, thus making it difficult to obtain their PST files by other methods.
To aid PST migration you can configure desktop clients so that, when a user starts Outlook, the client writes a marker into each PST file that is listed in the mail profile. When a marked PST file is subsequently imported, the marker indicates the owning mailbox.
PST migration is described fully in the Administrator's Guide.