Update health-probes.md

Author: Harikrishnan-M-B

articles/frontdoor/health-probes.md

@@ -75,6 +75,9 @@ Once an origin returns to a healthy state, Front Door resumes the normal load-ba
 
 If you have a single origin in your origin group, you can choose to disable health probes to reduce the load on your application. If you have multiple origins in your origin group and more than one of them is in enabled state, you can't disable health probes.
 
+> [!NOTE]
+> If there is only a single origin in your origin group, the single origin will get very few health probes. This may lead to a dip in origin health metrics but your traffic will not be impacted.
+
 ## Next steps
 
 - Learn how to [create an Azure Front Door profile](create-front-door-portal.md).