What will happen if I change the email address of a Lead or Contact in CRM?
If you change the email address of a Lead or Contact in CRM, the previously fetched emails (with the old email address) will not be available in CRM. Only the new emails (with the new email address) will be fetched in CRM and if you had enabled the email sharing option earlier, then that option would get disabled. You have to enable the email sharing option again for that particular lead or contact. The older emails will however be available in Zoho Mail.