Before you try to migrate content, verify that the account on the server you're migrating from is a "sudo" account. Otherwise, you will get an error like this one when you try to migrate:
visudo
to open the sudo file you need to edit.
NOTE: Do not edit this file using the standard vi editor. Use visudo
instead.
After you add your account to the sudo file on the server you are transferring content from, you can connect to your new server and use the Migration Manager to transfer your content.