I recently signed up for Zoho mail and have setup the app on my Samsung FE21 phone. Within the app the contacts and calendars work fine and sync but on my phone the contacts/calendars do not reflect the Zoho accounts.

When a call comes in the number is displayed but no reference to the contacts name held in the Zoho contacts database.

Is there a way to replace the phones contacts/calendars with the Zoho ones and have them sync?