When your account migration is complete you should receive a login prompt that looks like this:
The user ID should show has firstname.lastname@example.org. If you do not have an employee ID, you will need to enter your e-mail address. Enter your password and check the box for "Remember my credentials". Outlook will then give a prompt saying that Outlook has made a change and needs to be restarted. Once you reopen outlook your mail should start synchronizing shortly. Be patient as it does take some time for this process to complete depending on how much mail you have in your mailbox.