Windows Server 2019/2022: Microsoft Defender for Endpoint fails after Nov. 2021 updates

Windows[German]Short message for administrators who are already productive with Windows Server 2019 or even Windows Server 2022 and use Microsoft Defender for Endpoint as virus protection. Microsoft has admitted that after installing certain updates on these Windows Server versions, problems can occur and Defender no longer starts.


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Microsoft Defender for Endpoint (see) is Microsoft's enterprise endpoint security platform designed to help administrators of corporate networks prevent, detect, investigate and respond to advanced threats. Previously, the product was known as Defender ATP and must be booked separately.

Defender for Endpoint-Probleme unter Windows Server

Via above tweet, I became aware of the issue that Microsoft Defender for Endpoint may have startup issues on Windows Server 2019 or Windows Server 2022.

Entry in Server 2022 Health Dashboard

Microsoft has posted a related message in the Windows Server 2022 Health Dashboard, but it applies in a similar form to Windows Server 2019.

Microsoft Defender for Endpoint might fail to start or run

After installing KB5007205 or later updates, Microsoft Defender for Endpoint might fail to start or run on devices with a Windows Server Core installation. Note: This issue does not affect Microsoft Defender for Endpoint on Windows 10.

Microsoft specifies Windows Server 2022 and Windows Server 2019 as affected. For Windows Server 2019, however, update KB5007206 or a newer update is responsible for this problem. Microsoft is working on a solution and will release it with a further update.


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