Sharepoint AD User Authenticate To Another Domain?

Jun 11, 2010

I have a situation where I have to autheticate SharePoint user to another website that is not part of the sharepoint domain without asking user to login again.

I have sharepoint part of domain1. I have users in domain1 that log into sharepoint using NTLM by authenticating to domain1. I don't have any control over this domain and sharepoint configuration. I am working on a ASP.net application which needs to authenticate users from domain1 without prompting users for login if they have already logged into sharepoint server.

I may be able to install a webpart on the Sharepoint if this allows me to do single sign on between sharepoint and my application.

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