I'd like to integrate Zoho CRM with my Gmail account so that customer/lead emails are visible underneath each lead. I tried following this howto link, but when I go to  Setup  >  Apps & Add-ons  >  Zoho Apps, Zoho Mail is not visible as an option. I do have a working Zoho Mail account that is consuming my emails from Gmal, I'm just not sure how to link it with Zoho CRM. How do I complete the integration?

Thank you,

Darren David