I'm tring to log in to phone with http://PHONE-IP-ADDRESS/CGI/Screenshot
and I got this error:
<CiscoIPPhoneError Number="4" /> !!!
I have user with device association privileges, than I don't use DNS, so in my Enterprise parameters in the authentication url I use IP address instead name!!!
What to do next!????
I rebooted my UCCM several times.
Version is 18.104.22.1680-3.
This is Authentication problems with CallManager. Try changing the authentication url in the Enterprise parameters of CCM.
instead of enter IP address of CCM server. Hope this solves your problem.