We have Lync server 2013 in our environment with Polycom VVX 310 and CX3000 IP Phones. We have issue in login on to CX3000, User are getting error message "sign-in cancelled due the internal error" but one the same port with same user everything
is working fine on VVX 310 IP Phones. Kindly suggest what I can do to fix the issue with CX3000 IP Phones.