Implementing Cisco Collaboration Cloud and Edge Infrastructure (CLCEI) — Question 108

An external Jabber device cannot register. While troubleshooting this issue, the engineer discovers that privately signed certificates are being used on
Expressway-C and Expressway-E. What action will resolve this issue?

Answer options

• A. The private CA certificate must be placed in the phone trust store
• B. The Jabber client must register to the Cisco UCM internally before it will register externally
• C. The device running the Jabber client must download and trust the private CA certificate
• D. The device running the Jabber client must use a VPN to register

Correct answer: C

Explanation

The correct answer is C because the Jabber client device must trust the private CA certificate to establish a secure connection with the Expressway servers. Option A is incorrect because placing the certificate in the phone trust store alone does not address the registration issue. Option B is not relevant since the problem involves external registration, and option D introduces unnecessary complexity by suggesting a VPN when trusting the CA certificate is the primary requirement.