MC1135775 – M365 Change Digest

One-line summary

Admins using WSUS and Scan Cab for Windows 11 24H2 must re-deploy the updated August 2025 Scan Cab released after 9:15 AM PT on August 15, 2025 to fix update installation errors.

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Details

Body (from Message Center)

IMPORTANT: This notice is only relevant for environments where:

Windows Server Update Services (WSUS) is used to deploy Windows security updates to Windows 11, version 24H2 devices.
Scan Cab is used to check for update compliance
The August 2025 Scan Cab was deployed before 9:15 AM PT on August 15, 2025.

An updated version of the August 2025 Scan Cab was made available at 9:15 AM PT on August 15, 2025. This Scan Cab includes new metadata corresponding to the republished August 2025 security update for Windows 11, version 24H2 (KB5063878). The new Scan Cab only needs to be re-deployed in the environments where Windows Server Update Services (WSUS) is used for installing updates.

The republished update for Windows 11, version 24H2 addresses an issue where the August 2025 Windows security update (KB5063878) failed to install with error code 0x80240069 when installed via WSUS. The issue was not related to any content in KB5063878, but to how the update was published itself.

See the Additional Information section of this message for details.

How this affects your organization:

IT administrators who downloaded the Scan Cab before 9:15 AM PT on August 15, 2025, should re-acquire and re-deploy it if the Scan Cab is used to assess updates for environments where WSUS is used to deploy Windows security updates to Windows 11, version 24H2 devices.

No action is required on environments where Scan Cab is not employed and does not use WSUS to deploy updates to Windows 11, version 24H2 devices. However, please note that there might be non-Microsoft applications which utilize Scan Cab. Review the documentation for any software and update deployment tools which might be in use for your organization, to understand if this is applicable in your environment.

What you need to do to prepare:

Administrators can re-deploy the updated Scan Cab via their usual processes. For detailed guidance, see the Additional Information section below.

Additional information:

Updated Scan Cab: Download the new Scan Cab here
August 2025 security update might fail to install via WSUS with Error 0x80240069
Announcing a smaller WSUS Scan Cab - Microsoft Tech Community: Learn more about WSUS and the Scan Cab process
Using WUA to Scan for Updates Offline - Win32 apps | Microsoft Docs: Windows Update Agent (WUA) can be used to scan computers for security updates without connecting to Windows Update
WSUS and the Catalog Site | Microsoft Docs: The Catalog Site used by WSUS to import updates and drivers

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{
  "snapshot_item": {
    "action_required_by": null,
    "ai_action_required_by": null,
    "ai_actions": [
      "Re-acquire and re-deploy the updated August 2025 Scan Cab if previously downloaded",
      "Review update deployment tools for Scan Cab usage"
    ],
    "ai_master_tags": [
      "Security"
    ],
    "ai_model": "gpt-4.1",
    "ai_summary": "Admins using WSUS and Scan Cab for Windows 11 24H2 must re-deploy the updated August 2025 Scan Cab released after 9:15 AM PT on August 15, 2025 to fix update installation errors.",
    "ai_topics": [
      "Windows"
    ],
    "category": "preventOrFixIssue",
    "details_map": {},
    "id": "MC1135775",
    "importance": 5,
    "is_major_change": false,
    "last_modified": "2025-08-15T16:24:15Z",
    "ms_products": [
      "Windows"
    ],
    "platforms": null,
    "roadmap_ids": [],
    "services": [
      "Windows"
    ],
    "severity": "normal",
    "tags": [
      "Admin impact"
    ],
    "title": "An updated version of the August 2025 Scan Cab is available\t"
  }
}