The list shows mailboxes that currently have client-driven PST migration enabled.

You can use Select All to select every mailbox in the list, or Select None to clear all selections.

To select an individual mailbox, hold down Ctrl and then click the mailbox name.

To select a group of mailboxes, click the first mailbox you want to select. Then hold down Shift while you click the last mailbox in the group.

When you have selected the mailboxes for which you want to disable client-driven PST migration, click Next.