We have CUCM 188.8.131.5200-4 on production.
few 7945G phones firmware is upgrade to SCCP459.2.1S
On phones which is upgraded to this version, corporate directory is not working. Getting error "Host Not Found"
For the same model phone with firmware version SCCP458.5.2S, corporate directory is working fine.
Why the phone with SCCP459.2.1S corporate directory getting error "Host Not Found"
Cisco sw download shows SCCP459.2.1S is compatible with CUCM version 5.1.3.
Enterprise parameter Phone URL all configured with IP address.