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I'm contacting a web service using a certificate stored in Machine and in user space "myUser". When I contact the web service impersonating "myUser" from a win application all works well.

But when I contact this using SharePoint context (I have only 1 frontend) I have only sometimes the following error:

Could not establish trust relationship for the SSL/TLS secure channel with authority 'server.host:4443'

I verified that the web service is invoked using user "myUser" as expected but in SharePoint context sometimes this method crashes.

I don't know what can be the problem. It seems related to SharePoint/ASP.NET security context but all seems to be ok. Any suggestion?

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We need more information to answer your question. Please edit your post and add further details. It will be closed for now, but don't worry - once you have improved the question flag a moderator and it can be reopened. See How do I ask questions here? for general guidelines. – Alex Angas Aug 29 '11 at 9:29

closed as too localized by Alex Angas Aug 29 '11 at 9:29

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