I am wondering whether it is possible for me to write my own connector to work with the open source version of the Zimbra server.

I know the open source version doesn't support the standard connectors (like the "iSync/CalDAV connector"), and I would like to know if I could implement the same protocol into my own connector and use it in the same way.

If yes, is the API documented and available?

Thank you for any information.

Best regards,