Hi Gerri, thanks for the fast answer. My feeling is also, that one needs to do some changes to make the code also usable in a GUI program. If XrdClientAdmin->Connect() would return for example (kXR_connected, kXR_needsAuth, kXR_error) instead of a bool, and one implements a environment variable / or parameter to disable the internal password request, then, if XrdSecPWDAUTOLOG is set to 0, one can check on the result of Connect, whether one has to ask the user for a user/password combination. In a second round, one could then call connect with enabled authorization, using a callback to retrieve the password from the internal stored one. The autologon feature is not helpfully in my case, as I want to be able to communicate with a xrootd server to which I do not have login access. Joern