Source note · Planning a Unified CM upgrade
In a standard deployment, IM and Presence must run the same release as Unified CM, and a mismatch is not supported. Centralized deployments may mix releases.
Checked 2026-09-25
a release mismatch is not supported
- Vendor
- Cisco
- Product
- IM
- Subsystem
- version compatibility
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15x
- Checked
- 2026-09-25
Sources
- Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x — Cisco Systems · tier 2 current vendor documentation · Version compatibility between Unified CM and IM and Presence Service section
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-imp-release-must-match. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-imp-release-must-match
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-imp-release-must-match,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-imp-release-must-match},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-imp-release-must-match},
note = {Source note cucm-upgrade-planning-imp-release-must-match, checked 2026-09-25}
}