Source note · Setting up the Webex App for Unified CM calling
For MRA with self-signed certificates, the Unified CM Tomcat and CallManager certificates must have different common names because Expressway cannot trust two self-signed certificates with the same CN.
Checked 2026-09-30
the two certificates must have different common names
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- certificates
- Deployment
- on-premises, hybrid
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- Deployment guide for Calling in Webex App (Unified CM) - Prepare your environment for Calling in Webex App (Unified CM) — Cisco Systems · tier 2 current vendor documentation · Prepare your environment > Certificate requirements > MRA
Cite this note
APA
WarmTransfer. (2026, September 30). Setting up the Webex App for Unified CM calling: source note cucm-webex-app-calling-setup-cert-selfsigned-cn. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-webex-app-calling-setup-cert-selfsigned-cn
BibTeX
@misc{warmtransfer-claim-cucm-webex-app-calling-setup-cert-selfsigned-cn,
title = {Setting up the Webex App for Unified CM calling: source note cucm-webex-app-calling-setup-cert-selfsigned-cn},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-webex-app-calling-setup-cert-selfsigned-cn},
note = {Source note cucm-webex-app-calling-setup-cert-selfsigned-cn, checked 2026-09-30}
}