Common questions here are about certificates and how to get MS servers to recognize some of the many they don't recognize easily, about crypt/decrypt error codes and what they mean, and almost every other subject relating to Micosoft's proprietary approach to encryption and security.

A lot of the Q & A here seems to revolve around JAVA issues, and forcing Microsoft products to work with compliant, non-MS versions. It is a recurring theme, as are other compatibility issues. Most of the answers are from fellow MS product users, not company people.

The signup process is rigorous, as it is with all Microsoft-sponsored mailing lists and other product support features, but if your work requires you to deal with Windows-based cryptography, this is "the" place to get answers to your technical questions.