We are running Shibboelth IdP v3.3.1 which supports the CAS v3 protocol.
It uses the UM Directory server. This contains all UM students and faculty/staff/affiliates for UMCP, UMES, UMCES, & USMO.
Users can use their Directory ID (uid) or their U_ID number (employeeNumber) to authenticate to CAS. In either case, CAS will return the Directory ID.
Here is a little presentation on how a CAS authentication works.
See the CAS Protocol specification for details on the parameters.
All users of CAS are strongly encouraged to subscribe to the UMDIRECTORY listserv list
by sending a message to firstname.lastname@example.org with a body of