Logon as a user without a password

In Windows, it is possible to logon as a different domain user without any credentials.  This is known as a S4U or a Service For User Logon.  This is a Microsoft Extension to Kerberos introduced with Windows Server 2003.  There have been several articles and post on this topic but I thought it would be…

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LogonUser + LOGON32_LOGON_NEW_CREDENTIALS, What is this flag used for?

A new flag was introduced in Windows VISTA for LogonUser(), LOGON32_LOGON_NEW_CREDENTIALS.  https://msdn.microsoft.com/en-us/library/windows/desktop/aa378184(v=vs.85).aspx The remarks say the following for this flag: “This logon type allows the caller to clone its current token and specify new credentials for outbound connections. The new logon session has the same local identifier but uses different credentials for other network connections.”…

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.NET Hotfix Rollup for August 2015

Jeff here, There is a .NET hotfix rollup for August. 3078646  Issues that this hotfix rollup resolves Issue 1 Assume that you have a Windows Presentation Foundation (WPF) application that creates an XPS file, and this XPS file has an embedded font that is missing some special characters. Assume then that you have another WPF…

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Windows August 2015 Hotfix List

Hey guys. Jeff here from the Windows SDK team. Here are this month’s hotfixes.   KB2966038   Printer managed by custom print providers is not visible in Devices and Printers in Windows KB3071345   Start screen customization is disabled for a Windows Embedded 8.1 Industry Pro-based computer KB3073902   NDES stops working after you restart a Windows Server…

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