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Get "Untrusted signature - the trust chain cannot be verified" while verifying digitally signed Info

Posted By:      Posted Date: October 07, 2010    Points: 0   Category :SharePoint


Hi all,


I have browser-enabled InfoPath form that contains digital signature.

User can open this form in his browser, to fill it out and to sign it with his own key/certificate.

The signing process completes successfully,

but when this form is opened for verification, SP displays following message:


Untrusted signature - the trust chain cannot be verified.


The Root certificate of CA that issued user's certificate presents in Trusted Root Certification Authorities store on the SharePoint Server. When the same filled signed form is downloaded to the local file (on SharePoint server PC) and verified with InfoPath application, the signature is valid and verified successfully.


What am I missing and how SP-server verifies certifcation chain?


Thanks in advance,






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