Learn Editor: Update mde-linux-prerequisites.md

Author: rutujadangemicrosoft

defender-endpoint/mde-linux-prerequisites.md

@@ -110,8 +110,13 @@ The following Linux server distributions are supported:
 | Mariner | 2 | 2 |
 
 > [!NOTE]
-> Distributions and versions that aren't explicitly listed above, and custom operating systems, are unsupported (even if they're derived from the officially supported distributions).
+> Distributions and versions that aren't explicitly listed above are unsupported
 > Microsoft Defender for Endpoint is kernel-version agnostic for all other supported distributions and versions. The minimal requirement for the kernel version is `3.10.0-327` or later.
+> 
+> Microsoft Defender for Endpoint on Linux **can be installed and may function** on customized operating systems that meet minimal kernel requirements and are derived from known, standard, vendor‑provided Linux distributions that Microsoft supports . Customers are free to onboard and run MDE on such environments; Microsoft does not block onboarding or execution.
+> However, these customized environments are not part of Microsoft’s validated or maintained support baseline. As a result, they are treated as custom OS configurations from a support perspective.
+> Customers are expected to validate MDE within these custom environments and, if needed, reproduce issues on a supported, standard (unmodified) Linux distribution. If an issue cannot be reproduced on a supported distribution, Microsoft may be unable to proceed with further investigation or remediation.
+> For full support coverage and a predictable support experience, customers are recommended to run MDE on a supported, vendor-provided Linux distribution as outlined in the official prerequisites.
 
 > [!WARNING]
 > Running Defender for Endpoint on Linux alongside other fanotify-based security solutions is not supported and may lead to unpredictable behavior, including system hangs.