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

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
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
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