When running somewhere besides the server the credentials will not always be available since they are never cached locally. If this property returns false then all calls to get server credentials will return null data
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2