Source note · Troubleshooting Cisco IP phone registration
Secure MRA registrations fail if the Expressway-C server certificate's Subject Alternative Names do not include the phone security profile names in use, and from X12.6 those profile names must be FQDNs in both Unified CM and the certificate.
Checked 2026-09-24
these names — in both Unified CM and in the Cisco Expressway's certificate — must be in FQDN format
- Vendor
- Cisco
- Product
- Expressway
- Subsystem
- MRA certificates
- Deployment
- on-premises
- Region
- not restricted
- Release range
- X12.6 and later; documented in X15.2
- Checked
- 2026-09-24
Sources
- Mobile and Remote Access Through Cisco Expressway Deployment Guide (X15.2) - MRA Troubleshooting — Cisco Systems · tier 2 current vendor documentation · MRA Troubleshooting > Registration failures > secure registration and phone security profile names
Cite this note
APA
WarmTransfer. (2026, September 24). Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-san. WarmTransfer. https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-san
BibTeX
@misc{warmtransfer-claim-cisco-phone-registration-troubleshooting-mra-san,
title = {Troubleshooting Cisco IP phone registration: source note cisco-phone-registration-troubleshooting-mra-san},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cisco-phone-registration-troubleshooting-mra-san},
note = {Source note cisco-phone-registration-troubleshooting-mra-san, checked 2026-09-24}
}