CRM integration with Zoho mail and Cal

CRM integration with Zoho mail and Cal

I there a way to integrate the Zoho mail Calendar with CRM.  I am trying to sync to a google Calendar 2 ways and it seems it is not working as described.  I can create items in CRM that will be synced to Zoho Calendar, but I am unable to create in google that will sync into the CRM.  I have the ability to add different Calendars as ical format into Google, that at least shows the calendar.  As for 2 way sync from Google or Zoho Mail calendar I have had no luck.  Any one else had any luck?  If I am unable to solve, I may have to look for another tool

The fact that the mail, Cal, and CRM do not fully talk is a show stopper if you are looking to manage a team working remote,