Before regenerating certificates, all endpoints should be powered on and registered so they can pick up the updated ITL. Phones offline during the change may need the ITL removed manually afterwards.
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 · Prerequisites section
Cite this note
APA
WarmTransfer. (2026, October 1). Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-regen-phones-registered. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-regen-phones-registered
BibTeX
@misc{warmtransfer-claim-cucm-itl-trust-troubleshooting-regen-phones-registered,
title = {Troubleshooting phone trust and ITL failures in Unified CM: source note cucm-itl-trust-troubleshooting-regen-phones-registered},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-itl-trust-troubleshooting-regen-phones-registered},
note = {Source note cucm-itl-trust-troubleshooting-regen-phones-registered, checked 2026-10-01}
}