How do I display localhost traffic in Fiddler while debugging an ASP.NET application?
If trying to catpure HTTPS traffic on a local machine from BizTalk using Fiddler, try using the WCF Adapter Proxy settings. I used an address of: http://localhost:8888/
Start Fiddler. Go to Tools--> Fiddler Options. Choose Connections tab. Check the 'USe PAC Script' option.
Now you will be able to monitor local traffic as well