Enterprise Vault provides a wizard that lets you enable mailboxes for client-driven migration. You can enable a small number of mailboxes at a time so that at any one time there is a manageable number of PST files to process.
After you have enabled a mailbox for client-driven PST migration, the Enterprise Vault Outlook Add-In starts scanning for PST files when the corresponding user next starts Outlook.
The list of PST files that have been found by all client computers appear in the Administration Console, in the container under .
The PST files are migrated immediately; you do not need to approve them.