Getting started with NetExt

  DISCLAIMER: NetExt is a free and open source WinDBG application that makes .NET debugging much easier as compared to the current options: sos or psscor. This extension is not a Microsoft product and limited support is provided only via its codeplex page. For now I am the only architect/developer, so you may experience delays…

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Finally a Federation STS sample using ASP.NET Forms Authentication!

  I have recently worked on an advisory case on which the customer was looking for a STS sample using ASP.NET Forms authentication as base to provide the claims. The Internet may be vast, but it is like a desert when it comes to a single sample of a STS leveraging forms authentication. Before continuing,…

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How to get a SAML Protocol Response from ADFS using C#

ADFS (Active Directory Federation Services) is a fancy name for Windows Identity Foundation Server. ADFS supports SAML protocol, however its client, Windows Identity Foundation (WIF), does not. As most of the problems of acquiring a token can be resolved with either WS-Federation and WS-Trust, you may use WIF for your federation needs since WIF supports…

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Verifying whether the broken piece is c2WTS or Active Directory

  If you have tried my tool to troubleshoot c2WTS with SharePoint, c2WTSTester, verified that the service is running as expected, the account used by SharePoint is valid in c2WTS but you still failed to receive a valid token for some error that does not make much sense, fear no more. It may be that…

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Troubleshooting Claims to Windows NT Token Service (c2WTS) in SharePoint 2010 may be difficult if you don’t know where to start

I have been writing some blogs entries (and even a Microsoft KB) about c2WTS, but the subject never exhausts. I was helping two different customers to troubleshoot issues with SharePoint Excel Services. In one of the cases the problem happened randomly and the error message was saying that the request to the external data (SQL)…

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Step by step configuration of Excel Calculation Services (ECS) when using Kerberos

There is no better way of learning something than to observe someone doing it step-by-step. I gathered information from different sources during the beta phase of SharePoint. So my thanks go to Darin Roulston, Eric Adams, Tracy Paddock, Jon Waite and other brave people who created the eco-system for all of us. The topology is…

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Claims to Windows Token Service (c2WTS) may not start automatically when you reboot your server (don’t blame SharePoint for that)

I know a large number of people who believe that Claims to Windows Token Service is a SharePoint feature. They are mistaken, c2WTS is part of Windows Identity Foundation (WIF) which is one of the pre-requisites for SharePoint. SharePoint indeed relies on c2WTS for delegation. It works this way: c2WTS extracts UPN claims from non-Windows…

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