diff --git a/windows/security/threat-protection/microsoft-defender-atp/indicator-file.md b/windows/security/threat-protection/microsoft-defender-atp/indicator-file.md
index c3312ea5e8..d350f89d1c 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/indicator-file.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/indicator-file.md
@@ -37,7 +37,7 @@ It's important to understand the following prerequisites prior to creating indic
 
 - 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.
 - To start blocking files, you first need to [turn the **Block or allow** feature on](advanced-features.md) in Settings.
 - This feature is designed to prevent suspected malware (or potentially malicious files) from being downloaded from the web. It currently supports portable executable (PE) files, including _.exe_ and _.dll_ files. The coverage will be extended over time.
 
@@ -76,4 +76,4 @@ Files automatically blocked by an indicator won't show up in the file's Action c
 - [Create indicators](manage-indicators.md)
 - [Create indicators for IPs and URLs/domains](indicator-ip-domain.md)
 - [Create indicators based on certificates](indicator-certificates.md)
-- [Manage indicators](indicator-manage.md)
\ No newline at end of file
+- [Manage indicators](indicator-manage.md)