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Merge pull request #5035 from rlitinsky/patch-67
Update OS requirements for Defender for Identity sensor
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defender-for-identity/deploy/prerequisites-sensor-version-3.md

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@@ -41,17 +41,14 @@ The following table summarizes the server requirements and recommendations for t
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|Prerequisite / Recommendation |Description |
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|---------|---------|
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|Operating System|The domain controller must have both:<br> - Windows Server 2019 or later<br> - [March 2024 Cumulative Update](https://support.microsoft.com/topic/march-12-2024-kb5035857-os-build-20348-2340-a7953024-bae2-4b1a-8fc1-74a17c68203c) or later.|
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|Operating System|The domain controller must have both:<br> - Windows Server 2019 or later<br> - [June 2025 Cumulative Update](https://support.microsoft.com/en-us/topic/june-10-2025-kb5060526-os-build-20348-3807-4e9453c4-6602-48ea-b349-689cd66dfdb9) or later.|
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|Specifications| A domain controller server with a minimum of:<br> - two cores<br>- 6 GB of RAM|
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|Performance| For optimal performance, set the **Power Option** of the machine running the Defender for Identity sensor to **High Performance**. |
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|Connectivity|Requires a Microsoft Defender for Endpoint deployment. If Microsoft Defender for Endpoint is installed on the domain controller, there are no additional connectivity requirements. |
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|Previous installations| Before activating the sensor on a domain controller, make sure that the domain controller doesn't have another Defender for Identity sensor already deployed.|
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|Server time synchronization|The servers and domain controllers onto which the sensor is installed must have time synchronized to within five minutes of each other.|
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|ExpressRoute|This version of the sensor doesn't support ExpressRoute. If your environment uses ExpressRoute, we recommend [deploying the Defender for Identity sensor v2.x](install-sensor.md).|
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> [!NOTE]
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> After the March 2024 Cumulative Update is installed, LSASS might experience a memory leak on domain controllers during on-premises and cloud-based Active Directory Domain Controllers service Kerberos authentication requests. [This out-of-band update: KB5037422](https://support.microsoft.com/en-gb/topic/march-22-2024-kb5037422-os-build-20348-2342-out-of-band-e8f5bf56-c7cb-4051-bd5c-cc35963b18f3) addresses this issue.
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### Dynamic memory requirements
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The following table describes memory requirements on the server used for the Defender for Identity sensor, depending on the type of virtualization you're using:

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