We have a web service which is kerberos protected which works with the c# client just fine if run from workstation of user with correct credentials. If we run that same web service from InfoPath we get soap problems. I am using InfoPath 2007. The error I get is WSE841: An error occured processing which seems to indicate information being passed in clear text i.e. not encrpted. Does MS not handle this out of the box. Is there a good article which tells you how to use Kerberos from InfoPath with the fat client.