Source note · Planning a Unified CM upgrade
Upgrading from Release 14SU4 to any Unified CM or IM and Presence destination lower than 15SU2 is not supported.
Checked 2026-09-25
Upgrades from Release 14SU4 to any Unified Communications Manager or IM and Presence Service cluster with destination versions lower than Release 15SU2...is not supported.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- upgrade paths
- Deployment
- on-premises
- Region
- not restricted
- Release range
- source 14SU4; destination below 15SU2
- 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 · Supported Upgrade Paths section, note on 14SU4
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-14su4-to-below-15su2. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-14su4-to-below-15su2
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-14su4-to-below-15su2,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-14su4-to-below-15su2},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-14su4-to-below-15su2},
note = {Source note cucm-upgrade-planning-14su4-to-below-15su2, checked 2026-09-25}
}