You will receive a welcome email from Entelo that will prompt you to create an account.
Once you set up your login credentials, you'll then want to log in to your account, click 'Edit profile & Settings', then click the 'Track' tab.
On the 'Track' tab, you'll see the Send on Behalf of section. From there, click 'Authenticate'.
Your email will then be authorized with Entelo. Once that's complete, you can choose the members from your team that you would like to grant permission to send on behalf of you.
Once you give those permissions, your team members will receive an email notifying them that they now are able to send as you. They will then be able to choose your name and email from the 'From' field when composing a message.