Zoho call journaling has stopped working but contact lookup works

[edossantos_sipcaller]

This would actually be the very first time I have had to correct time on a 3CX server.
Does anybody know whether the 3CX Debian ISO has any NTP configuration included? I would like to know in case a similar issue appears in the future.

I'm not sure about this to be honest, but it will not make any harm if you add that.

The support we recieved here on the 3CX Forum was fantastic, although I can't say the same for Zoho support as they were very dismissive toward the issue.

If I have understood this correctly, it was Zoho rejecting the data sent by 3CX and returning the error message in the logs.

Yes, that's correct. But the error message returned was not that clear, and that caused some confusion. It was mentioning an issue with the Call_Duration field, but it was actually the call start time.