A windows sp2 client join to windows 2003 server domain. Firstly, I using a des encryption user(desuser@mydomain.com) to login in windows xp client. Then i want to make a kerberos authentication in windows xp client. But got user name as desuser\@mydomain.com@MYDOMAIN.COM When using the method "krb5_unparse_name" to getting user name. I tested Windows 7 client, it is ok when using desuser@mydomain.com. This is why? I think the problem may be in the system environment settings on winxp. Who can help me? Thanks!