Disable Mailbox for Client-Driven PST Migration

The wizard lets you disable client-driven PST migration for selected mailboxes. When you have completed the wizard, client-driven PST migration is disabled when both the following have happened:

The mailbox archiving settings have been synchronized. This happens on a normal archiving run, or you can force it to take place immediately by using the Synchronize option on the Synchronization tab of the Exchange Mailbox Task's properties.
The user has started a new Outlook session.

Migrations of any PST files that have been partially migrated is not completed.

Select the Microsoft Exchange Server computer that has the mailboxes you want to disable and then click Next.