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How to use /_vti_bin/Authentication.asmx with IP-STS

Posted By:      Posted Date: September 22, 2010    Points: 0   Category :SharePoint

Currently have SharePoint configured to use a custom IP-STS, but require external applications like Silverlight & Biztalk to connect to SharePoint Web Services.

Cannot find any guidance on how STS user can authenticate into SharePoint, does any exist?  Since SharePoint must re-direct user credentials to the IP-STS before access is granted how does this work when using Web Services programmically.

Have client applications using MOSS 2007 Web Services /w FBA users, it appears this PORT to SharePoint 2010 is a complete rewrite (if even possible)?

Thanks in advance for any help.

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