Writing a test application for my AppFabric-based library, I started getting a strange exception.
The X.509 certificate CN=servicebus.appfabriclabs.com chain b
Surprisingly, I had the same problem not so long ago. I contacted the AppFabric team, and they confirmed nothing was wrong with the actual certificate.
After a lot of scouting around, I considered clearing the CRL, because it gets cached. I finally found the answer in a comment in a blog post.
This worked for me:
certutil -urlcache * delete
Interestingly enough, this does not appear to be an AppFabric issue but something on the Windows machines. Let me know if it works.