That is correct. CFD service is disabled on 3CX hosted instances. You will need to host your own instance or move to a on premise solution. CFD also requires a PRO licence.Correct me if I am wrong, but didn't I see somewhere that you couldn't use CFD on the 3CX hosted platform?
Founded in 2005, when VoIP was an emerging technology, 3CX has gone on to establish itself as a global leader in business communications.