Zoho CRM Calendars Linked to Google Apps for Business are Shared Throughout Organization - How to Stop

Zoho CRM Calendars Linked to Google Apps for Business are Shared Throughout Organization - How to Stop

I have linked all of my Zoho CRM users to Google Apps and enabled 2-way sync. However, not everyone can see everyone else's calendar. Is there a way to stop that? I don't want to use a separate Google calendar - I want to use the Goggle Apps users' primary calendar.