S4UClient.UpnLogon Method

[Starting with the .NET Framework 4.5, Windows Identity Foundation (WIF) has been fully integrated into the .NET Framework. The version of WIF addressed by this topic, WIF 3.5, is deprecated and should only be used when developing against the .NET Framework 3.5 SP1 or the .NET Framework 4. For more information about WIF in the .NET Framework 4.5, also known as WIF 4.5, see the Windows Identity Foundation documentation in the .NET Framework 4.5 Development Guide.]

Creates an impersonate-capable WindowsIdentity from a Kerberos unique principal name (UPN) by using the local claims to Windows Token Service (c2WTS).

Namespace: Microsoft.IdentityModel.WindowsTokenService
Assembly: Microsoft.IdentityModel (in Microsoft.IdentityModel.dll)


Dim upn As String
Dim returnValue As WindowsIdentity

returnValue = S4UClient.UpnLogon(upn)


Public Shared Function UpnLogon ( _
    upn As String _
) As WindowsIdentity
public static WindowsIdentity UpnLogon (
    string upn
static WindowsIdentity^ UpnLogon (
    String^ upn
public static WindowsIdentity UpnLogon (
    String upn
public static function UpnLogon (
    upn : String
) : WindowsIdentity


  • upn
    The Kerberos unique principal name (UPN) of the Windows identity desired.

Return Value

Returns WindowsIdentity. The Windows user specified by the UPN.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.


Target Platforms

Windows 7, Windows Server 2008 R2, Windows Vista SP2, Windows Server 2008 SP2, Windows Server 2003 SP2 (32-bit or 64-bit)

See Also


S4UClient Class
S4UClient Members
Microsoft.IdentityModel.WindowsTokenService Namespace

Other Resources

Claims to Windows Token Service (c2WTS) Overview

Copyright © 2008 by Microsoft Corporation. All rights reserved.