Merge pull request #228207 from kellydevens/patch-16

Update update-tle.md

Author: prmerger-automator[bot]

articles/orbital/update-tle.md

@@ -14,6 +14,11 @@ ms.author: apoorvanori
 
 Update the TLE of an existing spacecraft resource.
 
+ > [!NOTE]
+   > TLE stands for Two-Line Element.
+   > 
+   > Be sure to update the TLE value before you schedule a contact. A TLE that's more than two weeks old might result in an unsuccessful downlink.
+
 ## Prerequisites
 
 - An Azure account with an active subscription. [Create an account for free](https://azure.microsoft.com/free/?WT.mc_id=A261C142F).