Signed templates for a form that uses signed sections

james_carter — Tue, 29 Sep 2009 09:48:51 GMT

We have an InfoPath 2007 form published to a SharePoint 2007 library that uses digital certificates to sign approvals of sections within the form. The form also uses quite a lot of code so the template has to be signed as well. All the certificates are issued by our internal CA - so far so good.

My questions are:

As user signing certificates expire the signatures on the form switch to invalid - I understand that this is by design and why certificates work this way - however apart from issuing REALLY long user certificates has anyone found a way around this issue by renewing certificates for example ?
When the code signing certificate expires the normal InfoPath method is to just resign and re-publish the template but this invalidates ALL the approval signings on every form. Is this really what is intended - it is a real pain if the form has a long active life, maybe several years.

Any help or comments gratefully received.

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Signed templates for a form that uses signed sections