To customize the way PSTs are migrated for a group of users, you can edit the settings in the Exchange PST Migration policy that is associated with the provisioning group to which the users' mailboxes belong. Exchange PST Migration policies are listed under > in the Administration Console.
The Exchange PST Migration policy properties include settings to define the following:
Whether to create shortcuts for migrated items, and where to create them.
Whether to adjust Exchange Server quotas to accommodate the additional shortcuts in mailboxes.
Whether to migrate the Deleted Items folder, and unexpired calendar items.
The folder structure to create for shortcuts in the mailbox and Archive Explorer.
The Windows code page to use if the PST Migrator creates folders in the user's mailbox.
When items have been migrated, the original items in the PST files are not deleted. If you want to delete the user's PST file after successful migration, choose to do so on the tab of the PST Migration policy.