Using fiddler for DCO diagnostics

Fiddler can be used to view server decision logic when troubleshooting DCO ads

Just follow these three simple steps!

1. Break on the MSN RAD call2. Insert the debug parameter3. Refresh page and view Bursting server response

Break on the MSN RAD call

identify RAD call which returns MM ad tag

Set breakpointhighlight rad callto set breakpoint, click in black command line at bottom of session window on the left. type bpu CTRL+i to insert RAD URL as the URL to break on

Refresh ad RAD URL will be identified in fiddler by a red arrow-like symbolBreakpoint will stop the ad from loading and allow you to modify the codeClick break on response button to edit code

Add &mmdebug=1 to set the debug parameterClick run to completion button to allow modified code to run

View server response by highlighting initial call to bursting serverThe trace should give a basic rundown of the decision logic and if

there was a targeting match found