Overview
KB5039227, released on June 11, 2024, is a cumulative security update for Windows Server 2022, specifically OS Build 20348.2527. This update introduces several quality improvements and addresses various issues that have been reported by users. Notably, it enhances the Server Message Block (SMB) over Quick UDP Internet Connections (QUIC) by enabling client certificate authentication, allowing administrators to control client access more effectively. Additionally, the update optimizes the cumulative update package size, reducing it by approximately 20%, which leads to improved download speeds and reduced bandwidth usage, particularly beneficial for environments with slower connections.
The update also includes fixes for several critical issues affecting various components of Windows Server. These include problems with Outlook and OneNote search functionalities, issues with lsass.exe causing unresponsiveness, and challenges with Windows Hello for Business authentication. Furthermore, it addresses several bugs related to Microsoft Edge, Storage Spaces Direct, and Windows Defender Application Control, among others. Overall, this update aims to enhance system stability and security while providing essential functionality improvements.
General Purpose
The primary purpose of KB5039227 is to enhance the security and performance of Windows Server 2022. Key features of this update include the activation of SMB over QUIC client certificate authentication, which allows for more secure and controlled access to SMB servers. The update also eliminates reverse differentials in the latest cumulative update (LCU), allowing clients to generate playback deltas, which significantly reduces the size of the update package. This change not only minimizes network traffic but also improves download speeds, making it easier for users with limited bandwidth.
Moreover, the update addresses multiple issues that have been reported by users, including the malfunctioning search features in Outlook and OneNote when used in Azure Virtual Desktop environments, and problems with lsass.exe that could lead to system unresponsiveness. Other fixes include resolving issues with Windows Hello for Business, Microsoft Edge UI errors, and various bugs affecting Remote Desktop and Storage Spaces Direct functionalities. These improvements are crucial for maintaining the reliability and security of server operations.
General Sentiment
The general sentiment surrounding KB5039227 appears to be mixed. While many users appreciate the enhancements in security and performance, there are notable concerns regarding the update's impact on system stability. Reports from users indicate that after installing the update, some experienced significant issues, such as domain unavailability in Windows Server 2022 domain controllers, which required the update to be uninstalled to restore functionality. This has raised alarms about the reliability of the update, particularly in critical environments.
On the positive side, the improvements in SMB over QUIC and the reduction in update package size have been well-received, as they contribute to better performance and security. However, the presence of known issues, particularly those affecting user account management and SQL server functionalities, has led to caution among IT professionals considering the update. Overall, while the update offers valuable enhancements, the reported problems necessitate careful consideration before deployment.
Known Issues
- After installing this update, users may be unable to change their user account profile picture, receiving an error code 0x80070520.
- There are issues with Azure Synapse SQL Serverless Pool databases entering a "Recovery pending" state, particularly in environments using Customer-Managed Key (CMK).
- Problems with Microsoft 365 Defender's Network Detection and Response (NDR) service may interrupt network data reporting, with notifications available in the Microsoft 365 admin center.
Disclaimer: We take measures to ensure that AI-generated content is of the highest possible quality, but we cannot guarantee its accuracy and recommend that users do their own independent research. Generated on 2024-12-21 11:20 PM