Hello All, I am running kerberos service as an IIS process i.e. w3wp.exe . In that the call to OpenProcessToken() Line 52 of file secure.cxx is failing. It is giving error no 5 which means *ERROR_ACCESS_DENIED. *Please let me know if there is any setting in kerberos or windows that I need to do for the OpenProcessToken call to work. -Regards Mohit