Refer to the exhibit. When a user tries to sign in to the Cisco Jabber client through Mobile and Remote Access, they receive this error message: "Cannot communicate with the server." The external…

Question

Exhibit

Options

• AThe _sips DNS record must target expE-pub.cll-collab.internal and the _cisco-uds DNS record
• BThe collab-edge DNS record must be added to the DNS server and the _cisco-uds DNS record
• CA Cisco CSF device must be configured in UC for the user and the _cisco-uds DNS record must
• DThe HTTP allow list is not allowing communication with the Instant Message and Presence

• A
  3% (1)
• B
  86% (31)
• C
  3% (1)
• D
  8% (3)

Explanation

For Cisco Jabber clients to use Mobile and Remote Access (MRA), the external DNS server must contain two critical SRV records: the '_collab-edge._tls.<domain>' record (commonly referred to as the 'collab-edge' record) and the '_cisco-uds._tcp.<domain>' record. The collab-edge SRV record is what allows Jabber to discover the Expressway-E server when connecting from outside the network. Without it, Jabber cannot locate the Expressway-E entry point, resulting in the 'Cannot communicate with the server' error. The _cisco-uds record is required for Jabber to communicate with Cisco UCM's User Data Services for authentication and configuration. If the exhibit shows these records are missing, option B correctly identifies that the collab-edge DNS record must be added along with the _cisco-uds record.

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