Update indicator-certificates.md

windows/security/threat-protection/microsoft-defender-atp/indicator-certificates.md

@@ -38,7 +38,7 @@ It's important to understand the following requirements prior to creating indica
 
 - This feature is available if your organization uses Windows Defender Antivirus and Cloud-based protection is enabled. For more information, see [Manage cloud-based protection](../windows-defender-antivirus/deploy-manage-report-windows-defender-antivirus.md).
 - The Antimalware client version must be  4.18.1901.x or later.
-- Supported on machines on Windows 10, version 1703 or later.
+- Supported on machines on Windows 10, version 1703 or later, Windows server 2016 and 2019.
 - The virus and threat protection definitions must be up-to-date.
 - This feature currently supports entering .CER or .PEM file extensions.