New Zoho Mail app - how to sync calendars?

New Zoho Mail app - how to sync calendars?

Hi

I just started using the new Zoho mail app (Apple) - great functionality

However, when I invite someone to a meeting via the app, it doesn't appear in my Zoho CRM calendar online / website

I tried the "sync desktop settings" option in the settings - but with no effect

How do I sync these? 

Thanks

Ross