diff --git a/windows/security/threat-protection/microsoft-defender-atp/common-errors.md b/windows/security/threat-protection/microsoft-defender-atp/common-errors.md
index 34adbf6fbe..c43240cb86 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/common-errors.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/common-errors.md
@@ -46,6 +46,7 @@ DisallowedOperation | Forbidden (403) | {the disallowed operation and the reason
 NotFound | Not Found (404) | General Not Found error message.
 ResourceNotFound | Not Found (404) | Resource {the requested resource} was not found.
 InternalServerError | Internal Server Error (500) | (No error message, try retry the operation or contact us if it does not resolved)
+TooManyRequests | Too Many Requests (429) | Response will represent reaching quota limit either by number of requests or by CPU.
 
 ## Body parameters are case-sensitive