I've been having this difficulty for the longest time. I've tried using some third-party apps that Zoho has recommended on syncing my Zoho Mail account for my contacts and my Calendar to sync with my Android phone's native Contacts and calendar with no luck. It can't be the only one that has this issue. How many people have Android phones that are going through the same thing? So what is the problem? Why is it this difficult to get this Synced?