How do I sync Zoho Mail Calendar with my Zoho CRM Calendar?
Go to calendar.zoho.com
Click Settings > Zoho Apps > select Zoho CRM.
Click Synchronize.
That's it! All your events you create in either calendar will now sync with each other.
Please note that Zoho Calendar allows integration with many calendar apps. When you create an event in Zoho Mail, make sure that you select the Zoho CRM Calendar from the Calendar dropdown list. By default, your personal mail calendar is selected. If you don't switch to Zoho CRM Calendar, the event will not get synced on the other side. Similarly, select your calendar under Zoho CRM Calendar on the left pane to view your CRM events in Zoho Mail.