If you are implementing MBR CRM into an existing site, you may want to create contact records for your existing users on the site.
For example, if you had a WooCommerce store and users, as a result, you would want to convert those users into contacts.
To Sync your user list with your contact list go to Mbrcrm > Tools > Sync Users & Contacts.
You can optionally choose to sync the User meta with the contact meta as well. This will take a bit longer.