Export tasks

Hi,

I want to export my tasks to Google Apps Tasks. But I cannot find the settings to do this.

When I go to Setup > Apps and addons > Google Apps I see only the possibilities to synchronise Contacts and Calendar.
Although the documentation says there should be an option Tasks it isn't there.

When I create a task in Zoho CRM there is no button "Save and Export to Google".

I seached and searched for a solution, but cannot find it. Anybody an idea? Thanks Sophie