I've tried looking through all the available user folder types and I'm still not sure I understand which one is best for me. Here is my situation: I'm trying to setup a Zope server on our corporate intRAnet set. We have a formal system of authenticating users. It is centralized. I don't want to go into too much detail, but suffice it to say that I can invoke a program and it will tell me whether the person requesting my page has a valid certificate and, if so, who the person is. What is the best scheme for integrating such a program into the Zope authentication and identification process. Key things are: 1) The user does not provide a password, only the validity of the certificate is checked. 2) How do I invoke an external program from Zope?!? 3) Are there any "out-of-the-box" user folders that can handle this? I couldn't find any. If not, what is the best open ended product and what would I need to do? Thanks for any help. -- Mike