300-820 · Question #205
The collaboration administrator is getting the following error: No Voicemail Service ?03 Forbidden? What might be the cause?
The correct answer is D. The Cisco Unity Connection (CUC) hostname is not included on the HTTP server allow list. A '403 Forbidden' error when accessing Cisco Unity Connection voicemail via Expressway indicates the CUC server hostname is missing from the Expressway HTTP server allow list, which blocks the HTTP-based voicemail communication.
Question
The collaboration administrator is getting the following error: No Voicemail Service ?03 Forbidden? What might be the cause?
Options
- AThe Cisco Unity Connection (CUC) has no user mailbox
- BThe Cisco Unity Connection (CUC) does not have a SIP trunk with Expressway
- CThe Cisco Unity Connection (CUC) server/cluster is not online
- DThe Cisco Unity Connection (CUC) hostname is not included on the HTTP server allow list
How the community answered
(64 responses)- A6% (4)
- B3% (2)
- C14% (9)
- D77% (49)
Why each option
A '403 Forbidden' error when accessing Cisco Unity Connection voicemail via Expressway indicates the CUC server hostname is missing from the Expressway HTTP server allow list, which blocks the HTTP-based voicemail communication.
A missing user mailbox on CUC would typically produce a different error related to the specific user account, not a generic 403 Forbidden at the service level.
The absence of a SIP trunk between CUC and Expressway would cause call routing failures, not an HTTP 403 Forbidden error which is specific to web/REST communication.
If the CUC server were offline, the error would be a network connectivity failure or timeout, not a 403 Forbidden which indicates the request was received and explicitly rejected.
Expressway uses an HTTP server allow list to control which external servers it will allow HTTP traffic to or from; if the Cisco Unity Connection hostname is not present in this list, Expressway rejects the connection with a 403 Forbidden error, preventing voicemail access.
Concept tested: Expressway HTTP server allow list for Unity Connection voicemail
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-3/exwy_b_mra-deployment-guide/exwy_m_cisco-unity-connection-integration.html
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