Shocker! - Do not use Environment.MachineName
I first found this article after I got an issue: http://blogs.msdn.com/b/brada/archive/2005/08/10/449767.aspx Let me go around to clarifying this further, and how I re-verified this issue http://msdn.microsoft.com/en-us/library/system.environment.machinename.aspx MSDN clarifies that this is NETBIOS name. http://en.wikipedia.org/wiki/NetBIOS Wikipedia clarifies that NETBIOS name has 16 characters, but Microsoft uses only 15 characters for the same. http://msdn.microsoft.com/en-us/library/system.net.dns.gethostname.aspx This is what should be used.