Why is the Jabber client unable to sign in?

exams 300-820 300-820 exam 0 Comments

Refer to the exhibit.

While troubleshooting Cisco Jabber login issues, there are some error messages.

Why is the Jabber client unable to sign in?
A . down Cisco Unified Communications Manager server
B . XMPP bind failures
C . incorrect login credentials
D . service discovery issues

Answer: B