During the last task, you updated the MX record for your domain. Now it's time to verify that all email is being routed to ...

During the last task, you updated the MX record for your domain. Now it's time to verify that all email is being routed to %BRAND_OFFICE_365_SHORT%. After verification, you can delete the migration batch and stop the synchronization between your old email system and %BRAND_OFFICE_365_SHORT%. Before you take this step, make sure that your users are using %BRAND_OFFICE_365_SHORT% exclusively for email. After you delete the migration batch, email that is sent to your old mailboxes isn't copied to %BRAND_OFFICE_365_SHORT%. This means your users can't get that email, so make sure that all users are on the new system.