WSUS, offline scans, supersedence & .NET (#46059)

* WSUS offline scans & .NET

* Fix NOTE

* Update docs/core/install/includes/microsoft-update.md

Co-authored-by: Genevieve Warren <[email protected]>

* Update docs/core/install/includes/microsoft-update.md

Co-authored-by: Genevieve Warren <[email protected]>

* Clarify offering 6.0.35

---------

Co-authored-by: Genevieve Warren <[email protected]>

Author: joeloff

docs/core/install/includes/microsoft-update.md

@@ -39,3 +39,10 @@ Updates for server operating systems are supported by WSUS and Microsoft Update
 | .NET 6 | HKLM\SOFTWARE\Microsoft\\.NET\6.0 | AllowAUOnServerOS | REG_DWORD | 0x00000001 |
 | .NET 5 | HKLM\SOFTWARE\Microsoft\\.NET\5.0 | AllowAUOnServerOS | REG_DWORD | 0x00000001 |
 | .NET Core 3.1 | HKLM\SOFTWARE\Microsoft\\.NET\3.1 | AllowAUOnServerOS | REG_DWORD | 0x00000001 |
+
+#### WSUS and update classifications
+
+WSUS can be configured to provide specific updates based on their [classification](/troubleshoot/windows-client/installing-updates-features-roles/standard-terminology-software-updates). Updates for .NET are classified as either *security* or *critical*. If the latest update is classified as critical, an older *security* update might be offered when an older version of .NET is installed that's superseded by the latest security update. This also applies to using the offline CAB [(Wsusscan2.cab)](/windows/win32/wua_sdk/using-wua-to-scan-for-updates-offline?tabs=powershell) to scan a machine.
+
+> [!NOTE]
+> In some cases, WSUS might report a missing update for a version that's older than the .NET version you installed. For example, imagine a user installs .NET 6.0.36, the latest release of .NET 6. This version is classified as a critical (non-security) update. Then an application installs an older version, 6.0.33. (It's not uncommon for applications to include specific versions of .NET as a prerequisite.) If an admin configured WSUS to only provide security updates, the next scan will report 6.0.35 as a missing update. Machines configured to receive *security* updates through AU or WSUS will be offered 6.0.35, even when 6.0.36 is installed. The reason for this is that 6.0.35 supersedes 6.0.33 and is the latest *security* update.