Is Forms Authentication worth learning? Could it be used for enterprise wide companies with lots of traffic?

I know the question is kind of vague, but I need to know why most companies that I have worked for haven't used it. I find 开发者_StackOverflow中文版it very useful (along with the membership stuff). Am I missing something here?

Whether or not to use Forms auth, or windows auth is highly dependent on your project, its scope and user base. Your question is very broad, so my answer is as well. Also note that these are not absolute and highly subjective. Use Forms auth when your use base is external from the enterprise. Use Windows auth when your company has active directory and its user base is internal. Use Forms auth if you have a specific set of privileged and the infrastructure guys don't want to add 100 user groups. Use Windows auth if there are other internal applications and you want to implement Single Signon. Use forms auth if you want more control over password policies and user registration. Use Windows auth if your enterprise uses IE, and the users do not want to be prompted for username/password.

Again, highly subjective, and just because you want (for example) Single Sign On doesn't mean you can't use Forms auth. In the end, it just depends.