I've seen to have gotten the integration working and its logging calls, however, the call recording seems not to get passed back to Kommo CRM. Has anyone been able to get that part of the integration working?
The CRM integrations provided by 3CX do not handle recordings. There was some talk about adding that as a feature in future versions, but today the actual recording is not uploaded to the CRM. If you need that feature, you will need to write it yourself, or get some help from @ConceptsWeb or us (@VoIPTools).