I had the requirement to use the unified login (= Single Sign-on, SSO) feature of the Web Services in a windows application of me. The several .Loginx-Methods of Web Services have the disadvantace to commit credentials on method invoke. Unified login using the two methods WSChallengex and WSAuthenticate. Problem is, that booth methods are not well documented. After some reserach by myself, i found the right way to do this. Web Services using API-Methods of the NTLM-SPPI-Provider in Windows. Prerequirement is, that the unified login feature is enabled over the Configuration Policy: Set Default Computer Policy -> Web Services -> Unified login enabled to 1.
I have attached a Visual Basic Project as example. Login is done with the Method DoUnifiedLogin(). Parameterlist on Invoke should be self explained. After succesful Login, sample tries to create a procedure group (named "_mytest" on) the defined manager ITCMr140. Code should be easily portet to C#, C++ and Java.