What is the cause of this issue?

Users report issues while logging in to their voicemail using the Voicemail tab in their Cisco Jabber clients. The issue occurs after users provide valid Cisco Unified Communications credentials, but they receive a failure message.

What is the cause of this issue?
A . A proper service profile is not configured on Cisco Unified Communications Manager.
B . The voicemail users are not configured in the Cisco Unity Connection server.
C . The web application voicemail password is set “User Must Change at Next Sign-in”.
D . The voicemail password is not set for all users.

Answer: A