Learn Editor: Update web-content-filtering.md

Author: YongRhee-MSFT

defender-endpoint/web-content-filtering.md

@@ -53,7 +53,7 @@ Ensure you meet the requirements described in the following table:
 |:---|:---|
 | Subscription | Your subscription must include one of the following plans:<br/>- [Windows 10/11 Enterprise E5](/windows/deployment/deploy-enterprise-licenses)<br/>- [Microsoft 365 E5](https://www.microsoft.com/microsoft-365/enterprise/e5?activetab=pivot%3aoverviewtab)<br/>- Microsoft 365 A5<br/>- Microsoft 365 E5 Security<br/>- [Microsoft 365 E3](https://www.microsoft.com/microsoft-365/enterprise/e3?activetab=pivot%3aoverviewtab)<br/>- [Microsoft Defender for Endpoint Plan 1 or Plan 2](/defender-xdr/eval-defender-endpoint-overview)<br/>- [Microsoft Defender for Business](/defender-business/mdb-overview)<br/>- [Microsoft 365 Business Premium](https://www.microsoft.com/microsoft-365/business/microsoft-365-business-premium)|
 | Portal access | You must have access to the [Microsoft Defender portal](https://security.microsoft.com). |
-| Operating system | Your organization's devices must be running one of the following operating systems with the [latest antivirus/antimalware updates](microsoft-defender-antivirus-updates.md): <br/>- Windows 11<br/>- Windows 10 Anniversary Update (version 1607) or later <br/>- For macOS availability, see [Network Protection for macOS](network-protection-macos.md)<br/>- For Linux availability, see [Network Protection for Linux](network-protection-linux.md)|
+| Operating system | Your organization's devices must be running one of the following operating systems with the [latest antivirus/antimalware updates](microsoft-defender-antivirus-updates.md): <br/>- Windows 11<br/>- Windows 10 Anniversary Update (version 1607) or later <br/>- Windows Server 2019 or later <br/>- For macOS availability, see [Network Protection for macOS](network-protection-macos.md)<br/>- For Linux availability, see [Network Protection for Linux](network-protection-linux.md)|
 | Browser | Your devices must be running one of the following browsers: <br/>- Microsoft Edge<br/>- Google Chrome<br/>- Mozilla Firefox<br/>- Brave<br/>- Opera<br/>- Internet Explorer|
 |Related protection | [Windows Defender SmartScreen](/windows/security/threat-protection/microsoft-defender-smartscreen/microsoft-defender-smartscreen-overview) and [network protection](network-protection.md) must be enabled on your organization's devices. |