KB5050674

Hotfix update for Exchange Server 2016 CU23: April 18, 2025 (KB5050674)

Applies To

Exchange Server 2016

Hotfix update for Microsoft Exchange Server 2016 CU23 was released on April 18, 2025. It includes fixes for non-security issues and introduces new features.

Note: This update also includes all the updates that were included in the November 2024 security updates for Exchange Server.

Features introduced in this update

• Exchange Hybrid Dedicated App in Entra ID for Exchange 2016 CU23 and Exchange 2019 (CU14 and CU15)

Issues that this hotfix update fixes

• InvalidTimeZoneException after installing November 2024 SU (Version 1 or Version2)

Known issues in this hotfix update

• The Edge Transport service (EdgeTransport.exe) stops responding and then restarts. For more information and a workaround, see Edge Transport service stops responding after installing November 2024 SU or Exchange 2019 CU15.

Get Cumulative Update 23 Hotfix Update 15 for Exchange Server 2016

Method 1: Windows Update

This update is available through Windows Update as an Optional update. For more information see Windows Update: FAQ.

Method 2: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center.

• Microsoft Exchange Server 2016 Cumulative Update 23 HU15 -...