Compatibility with Windows Domain Controller Updates in Windows Server Aug 2025 security update

Additional information:

• product name: JovianDSS
• product version: all / version 
• build: all / version 

Subject: Compatibility of Windows Server Aug 2025 security update (as related to domain controllers)

The article covers the compatibility of Windows Server Aug 2025 security update (as related to domain controllers)
Specifically Microsoft update KB5066014 (CVE-2025-49716) with JovianDSS.

Contents:

Question:

Will this Windows update (as related to domain controllers) impact users' SMB access?

Answer:

All validation and compatibility tests related to Microsoft update KB5066014 (CVE-2025-49716) and Netlogon RPC hardening (Enforcement Level 2) have been successfully completed.

The Active Directory and SMB services operate correctly after the update — domain join, authentication, and file-share access all function as expected. No related errors were found in system or domain controller logs.

Result: 

Environment verified — no issues detected, system remains stable and compliant.

​Additional references:

Update: Windows Server May 2025 security update, superseded by Windows Server Aug 2025 security update.

Update change: Active Directory domain controllers will block RPC requests from anonymous clients

Microsoft Knowledge Base about the updates: KB5066014
https://support.microsoft.com/en-us/topic/kb5066014-netlogon-rpc-hardening-[..]