Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Upgrading from Legacy Releases

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/upgrade/15/cucm_b_upgrade-and-migration-guide_15/cucm_m_upgrading-from-legacy-releases.html

Published

2026-08-14

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Unified CM 7.0(1) and older cannot be migrated to Release 15; Cisco recommends rebuilding on the latest release from scratch. in context
• Unified CM 8.0(1) and 9.1 must first be migrated directly to 12.5 with PCD 12.6 (not PCD 14 or 15) before moving on to the current release. in context

Cite this source record

APA

WarmTransfer. (2026, August 14). Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Upgrading from Legacy Releases. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-upgrade-15-legacy-releases

BibTeX

@misc{warmtransfer-cisco-cucm-upgrade-15-legacy-releases,
  title  = {Upgrade and Migration Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs - Upgrading from Legacy Releases},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-upgrade-15-legacy-releases},
  note   = {Cisco Systems, accessed 2026-09-24}
}