Get UPN or email for logged in user in a .NET web application

Posted by DrStalker on Stack Overflow See other posts from Stack Overflow or by DrStalker
Published on 2009-07-09T05:15:46Z Indexed on 2010/03/28 3:03 UTC
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.NET

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c#

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active-directory

I'm not a .NET developer, and I have a feeling this would be trivial for someone who is:

I have a C# web application that makes user of the user credentials of the logged in user. Currently it uses the SID which comes from

System.Security.Principal.WindowsIdentity.GetCurrent().User.Value

I need to get either the users UPN login or email address (as defined in active directory) instead of the SID. GetCurrent() returns an object of type WindowsIdentity; looking in the details for WindowsIdentity Members:

MSDN: WindowsIdentity Members

I can't see anything that looks like it would give me either the UPN or email in there. How can I pull up that information to use, either by feeding the SID into some other function or calling something different in the first place.

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