New and Changed Information

New and Changed Information

The following table provides an overview of the significant changes to the features in this guide up to this current release. The table does not provide an exhaustive list of all changes made to the guide or of the new features up to this release.

Table 1. New Features and Changed Behavior in Unified Communications Manager and IM and Presence Service

Description

See

February 05, 2026

Added virtualization requirements for Release 15SU4 with VMware vSphere ESXi, Cisco NFVIS-for-UC, and Nutanix AHV.

See Requirements and Limitations.

February 01, 2024

Updated the "Enable the Kerneldump Utility" section.

Enable the Kerneldump Utility

December 18, 2023

Unified Communications Manager and IM and Presence Service and all applications have moved to a 64-bit architecture.

Some of the affected areas are:

  • Unified Communications Manager and IM and Presence Service 15 requires a minimum ESXi version of 7.0 U3 or 8.0 U1.

  • Virtual Floppy Drive is replaced with virtual CDROM for touchless installation.