Enterprise Vault provides the following tools for migrating (importing) the contents of PST files to archives:
Locate and Migrate - This locates PST files on users' computers, copies them to a central location, and then migrates them. Unless you have only a few PST files to migrate, Locate and Migrate is likely to require least effort on your part.
Client-driven Migration - This is similar to Locate and Migrate, but finding PST files and sending them to a PST collection area is performed automatically by the user's computer, as opposed to by the Enterprise Vault Server Tasks.
Scripted migration using Policy Manager - This is ideal for performing bulk migrations of PST files, but you need to collect the PST files in a central location.
PST Migrator 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.
Locate and Migrate partially automates the process of migrating the contents of PST files into Enterprise Vault. It can automatically search for PST files on users' computers and move them to a central holding area, from which they can be automatically migrated.
Locate and Migrate comprises the following Enterprise Vault task types:
A Locator task. This searches your network for computers and PST files. There can be only one Locator task in your Enterprise Vault site.
A Collector task. This moves PST files that the Locator task has found to a central holding folder, ready for them to be migrated. There can be many Collector tasks in your Enterprise Vault site.
A Migrator task. This migrates the contents of PST files that are in the holding folder to Enterprise Vault archives. There can be many Migrator tasks in your Enterprise Vault site.
The tasks are configured and scheduled using the Enterprise Vault Administration Console.
It is possible to configure the Enterprise Vault Outlook Add-Ins so that users can perform their own PST migrations. The underlying mechanism that is used is still Locate and Migrate, but users are able to queue their own PST files for migration.