Sync Zoho CRM with Contacts?

I’m running Zoho CRM, but need to use Thunderbird (IMAP) for contacts, email and calendar synchronized by Nextcloud/Owncloud for compliance and archival reasons.

There doesn’t seem to be any CardDAV support in Zoho CRM. They do support CardDAV with Zoho Contacts, but that doesn’t work with the rest of their system.

Is it possible to sync CRM with Contacts, and then connect to Zoho Contacts via CardDAV to achieve my solution?

Any help would be appreciated.

Thanks in advance!