McDewey

C H A P T E R 1 New and Changed Information • New and Changed Information, on page 1 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 See Description See Requirements and Limitations, on page 14. Added virtualization requirements for Release 15SU4 with VMware vSphere ESXi, Cisco NFVIS-for-UC, and Nutanix AHV. February 05, 2026 Enable the Kerneldump Utility, on page 84 Updated the "Enable the Kerneldump Utility" section. February 01, 2024 • See Requirements and Limitations, on page 14. • DNS requirements, on page 18 • Touchless Installation Task Flow for ESXi, on page 60 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. December 18, 2023 Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 1