Hi, When I add my Zoho account, which is using a personal domainname, to Thunderbird the addressbook is discovered and added, but none of the contacts are synced. If I add a contact in Thunderbird to the Zoho addressbook, the contact appears in Zoho's webmail contacts page, but is not counted in the number of contacts. When I edit the same contact in Zoho's webmail contacts page, the contact disappears from Thunderbird. the URI I am using is https://contacts.zoho.com/carddav/my_email/default/contacts/ Where my_email is my account email address. I'm using an account specific password, IMAP, SMTP and CalDAV work (though not calendar discovery - I have to add each calendar individually) and my DNS records have SRV records for all the services on Zoho. I'm running Thunderbird 128.2.3esr Flatpak from flathub on OpenSUSE Tumbleweed. Any ideas why this isn't working - I've seen a number of people having success with Zoho and Thunderbird. Thanks Alan