After regenerating the CallManager certificate, restart the CallManager, CTIManager, Trust Verification and TFTP services and reset all phones. Restart HAProxy as well if SSO or OAuth is enabled.
Checked 2026-10-01
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- Certificate management
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-01
- Checked
- 2026-10-01
Sources
- Regenerate Certificates In Unified Communications Manager — Cisco Systems · tier 2 current vendor documentation · CallManager certificate section (steps)
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-regen-callmanager-restarts. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-regen-callmanager-restarts
BibTeX
@misc{warmtransfer-claim-cucm-itl-trust-troubleshooting-regen-callmanager-restarts,
title = {Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-regen-callmanager-restarts},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-regen-callmanager-restarts},
note = {Source note cucm-itl-trust-troubleshooting-regen-callmanager-restarts, checked 2026-10-01}
}