Using Mailbox Power in the CRM
From any profile page click the purple "Actions" button and then click "Sync Contact".
This will bring up a modal with a variety of integration vendors that you can sync with, click "Mailbox Power".
This will bring up a list of your Mailbox Power "Groups" for you to choose from. This contact will be added to the Group(s) you choose.
A "Mailbox Power" badge will appear near the contact name when the contact has been successfully added to your Mailbox Power group.