Once we have set up our source, it's time to start performing the actual migration; we will start by defining what we want to migrate. At the top of the form, you will see the Migration start date, and it will have a drop-down menu that will allow you to define from what date to start migrating your messages, as shown here:
With Migration options, you can define if you also wish to Migrate deleted email, Migrate junk email, or if you wish to exclude top-level folders from migration by providing a comma-separated list of the folder names:
To start the migration process, click on Select user to open the Start Email Migration ...