I created a relay endpoint from BizTalk server and it worked fine. Later all of a sudden without me making any changes, it stopped working. In troubleshooting I found that BizTalk is receiving the message in base64 encoded format instead of xml, so I enabled to decode base64 option at the adapter and extract /Binary message part from the message and it worked fine for few days. Today again it stopped working and I see now the message are coming as xml without base 64 encoding.
Note: I used fiddler all the time to post the messages to Azure relay end point.
Can someone please help me on this? does anyone faced similar issue?