Source note · Planning a Unified CM upgrade
Make no configuration changes during the upgrade. Cisco says changes made then are overwritten, and that includes password changes, LDAP synchronisation and automated jobs.
Checked 2026-09-25
Stop all configuration tasks. Don't make any configuration changes during the upgrade.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- change freeze
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs as of 2026-09-25
- Checked
- 2026-09-25
Sources
- Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Upgrade Tasks — Cisco Systems · tier 2 current vendor documentation · Upgrade Tasks > Before You Begin (configuration freeze)
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-no-config-during-upgrade. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-no-config-during-upgrade
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-no-config-during-upgrade,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-no-config-during-upgrade},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-no-config-during-upgrade},
note = {Source note cucm-upgrade-planning-no-config-during-upgrade, checked 2026-09-25}
}