Source note · Planning a Unified CM upgrade
Refresh upgrades from a source release earlier than 12.5.x to Release 15 or later are not supported.
Checked 2026-09-25
Refresh Upgrades from Pre-12.5.x source to Release 15 and later isn't supported.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- upgrade paths
- Deployment
- on-premises
- Region
- not restricted
- Release range
- source earlier than 12.5.x; destination 15 and later
- 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 > Supported Upgrade and Migration Paths (note)
Cite this note
APA
WarmTransfer. (2026, September 25). Planning a Unified CM upgrade: source note cucm-upgrade-planning-no-refresh-from-pre-125. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-no-refresh-from-pre-125
BibTeX
@misc{warmtransfer-claim-cucm-upgrade-planning-no-refresh-from-pre-125,
title = {Planning a Unified CM upgrade: source note cucm-upgrade-planning-no-refresh-from-pre-125},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-upgrade-planning-no-refresh-from-pre-125},
note = {Source note cucm-upgrade-planning-no-refresh-from-pre-125, checked 2026-09-25}
}