Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/15_x/cucm_b_compatibility-matrix-cucm-imp-15x.html

Published

2026-07-16

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

• An upgrade from Release 14SU4 to a destination version lower than Release 15SU2 is not supported. in context
• Every supported path to Release 15 that uses the PCD Upgrade Task or the PCD Migration Task must use PCD Release 15. in context
• Every supported upgrade path to Release 15 in the compatibility matrix requires running the pre-upgrade-check COP file first. in context
• Unified CM Release 15 supports virtualized deployments only; bare-metal servers are not supported. in context
• Unified CM uses standard LDAPv3 to access user data and requires the supportedcontrol attribute to be configured on LDAPv3-compliant directory servers used for sync. in context
• Unified CM does not support mutual TLS (mTLS) for LDAP connections with Active Directory. in context
• The Unified CM 15x compatibility matrix lists Microsoft Active Directory on Windows Server 2016, 2019 and 2022 as supported LDAP directories. in context
• The Unified CM 15x compatibility matrix lists Microsoft Lightweight Directory Services 2019 and 2022 as supported LDAP directories. in context
• The Unified CM 15x compatibility matrix lists Oracle Unified Directory 12cPS4 and OpenLDAP Long Term Support release 2.5.16 as supported LDAP directories, plus other LDAPv3-compliant directories. in context
• Active Directory on Windows Server 2025 is not named in the Unified CM 15x supported LDAP directory list as of the 2026-07-16 matrix revision, so its support status rests only on the generic LDAPv3-compliant category. inferred in context
• Upgrading from Release 14SU4 to any Unified CM or IM and Presence destination lower than 15SU2 is not supported. in context
• Required COP files must be installed on every node before the upgrade starts, whether you use Unified OS Admin or Prime Collaboration Deployment. in context
• Cisco does not test Unified CM Release 15x with phones that are End of Life. in context
• 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. in context
• Unified CM and IM and Presence Release 15x support only virtualized deployments. Bare-metal servers are not supported. in context

Cite this source record

APA

WarmTransfer. (2026, July 16). Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-compat-matrix-15x

BibTeX

@misc{warmtransfer-cisco-cucm-compat-matrix-15x,
  title  = {Compatibility Matrix for Cisco Unified Communications Manager and the IM and Presence Service, Release 15x},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-compat-matrix-15x},
  note   = {Cisco Systems, accessed 2026-09-24}
}