Reverse LDAP lookup works semi-decently for a colleague of mine under OSX, in that e.g. out of two people with the cell field set only one gets resolved. For me under Linux, it doesn't work at all. We've compared our settings over and over, they're the same. So in order to get things to work reliably for both of us, what exactly happens in the background? Is there a debug mode where we can see the LDAP queries? I suspect that maybe country code or dial chars don't get worked around on reverse lookups.
Edit: I just looked at it with Wireshark and the correct contact is actually returned! But neither in the notification, nor in the Zammad window, nor in recent calls is the name displayed, only the number. Immediately after that, another LDAP request is being made, this time with no number in it, and a whole bunch of people are returned.