diff --git a/Block Outgoing Calls/README.md b/Block Outgoing Calls/README.md
index 657904e..a07c915 100644
--- a/Block Outgoing Calls/README.md	
+++ b/Block Outgoing Calls/README.md	
@@ -4,3 +4,4 @@ Block certain numbers in a reject list from being called from the system. Show a
 
 Open the macro in the macro editor and add more numbers to the list if you need to.
 
+**NOTE**: If you are using this extension on Webex Edge, edit the macro and set the delay timeout to 5 seconds, otherwise the blocking will not take place.