This guide is for once you have Mimecast installed.
You will see this message in the bottom of your screen.
Please click the box and you will see this next screen.
Click on the Authenticate button for Domain Authentication and enter your password.
Once complete it should show a green check mark as Active.
You are now set up for Mimecast.
For instructions on how to use Mimecast, please follow the article below.
https://kapcoinc.freshdesk.com/a/solutions/articles/43000603226