Hi Nigel, In theory it is possible to do this. You can get Bb to work with Shibboleth after a fight using "simple" web server delegation, but this is an all or nothing activity. To get the choice of AD or Shibb, then you will need to write a custom authentication class that offers the user the choice. Alternatively (or possibly additionally) you could look to switching to something like CAS to handle your authentication. This can be used as the WebISO required by Shibb (e.g. in place of something like PubCookie, which we used). CAS can "chain" authentication authorities, which is what you want to do. Cheers, Malcolm. --- Dr Malcolm Murray Learning Technologies Team Leader IT Service Durham University -----Original Message----- From: Blackboard/Courseinfo userslist [mailto:[log in to unmask]] On Behalf Of Frost N.J. Sent: Monday, December 17, 2007 2:26 PM To: [log in to unmask] Subject: Shibboleth with Blackboard Hi, I'm just starting on a project to implement Shibboleth authentication for Blackboard, specifically for students from another institution. I've got a bit of learning to do on the Shibboleth side, but there is one question that particularly concerns me... Is it possible to maintain the current LDAP/AD authentication for internal students, while at the same time providing Shibboleth WAYF for a few external students? If we have to move all access to Shibboleth, that will massively increase the scope of the project. Is it feasible to simply provide a different URL for the Shibboleth route? Has anyone had any experience of this? Regards, Nigel ________________________________ Nigel Frost Project Manager Information Systems Services University of Southampton SOUTHAMPTON SO17 1BJ email: [log in to unmask] phone: 023 8059 8826 (ext 28826) ________________________________