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windows/security/application-security/application-control/app-control-for-business/design/allow-com-object-registration-in-appcontrol-policy.md
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@ -17,7 +17,7 @@ The [Microsoft Component Object Model (COM)](/windows/desktop/com/the-component-
App Control for Business enforces a built-in allowlist for COM object registration. While this list works for most common application usage scenarios, you might need to allow more COM objects to support the apps used in your organization. You can specify allowed COM objects via their GUID in your App Control policy as described in this article.
> [!WARNING]
> When App Control is enforced, .NET doesn't load certain COM objects if their registration GUID doesn't match the one calculated by the system at runtime. When that happens, the user sees a general COM load error dialog, but no events or other information is logged to the system. The COM allowlist mechanism described in this article **doesn't affect .NET's GUID validation check for COM objects** leaving those .NET apps incompatible with App Control at this time. For more information, see [App Control Admin Tips & Known Issues: .NET doesn't load COM objects with mismatched GUIDs](../operations/known-issues.md#net-doesnt-load-component-object-model-com-objects-with-mismatched-guids)
> When App Control is enforced, .NET doesn't load certain COM objects if their registration GUID doesn't match the one calculated by the system at runtime. When that happens, the user sees a general COM load error dialog, but no events or other information is logged to the system. The COM allowlist mechanism described in this article **doesn't affect .NET's GUID validation check for COM objects** leaving those .NET apps incompatible with App Control at this time. For more information, see [App Control Admin Tips & Known Issues: .NET doesn't load COM objects with mismatched GUIDs](../operations/known-issues.md#net-doesnt-load-component-object-model-com-objects-with-mismatched-guids).
### Get COM object GUID