Source note · Planning a Unified CM upgrade
Switch versions on all Unified CM nodes before switching versions on any IM and Presence node.
Checked 2026-09-25
Before you switch versions on the IM and Presence Service nodes, you must first switch the Unified Communications Manager nodes, starting with the publisher node and then the subscriber nodes.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- sequencing
- 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 - Planning the Upgrade — Cisco Systems · tier 2 current vendor documentation · Planning the Upgrade > Upgrade Sequence (Unified CM and IM and Presence)
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-switch-cucm-before-imp. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-switch-cucm-before-imp
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-switch-cucm-before-imp,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-switch-cucm-before-imp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-switch-cucm-before-imp},
note = {Source note cucm-upgrade-planning-switch-cucm-before-imp, checked 2026-09-25}
}