I have an InfoPath form submitting to the same SharePoint site to which it is published. All Authenticated Users have contribute rights to the SharePoint site and to the form library. When a person submits a form to the library, they receive a pop-up asking for their credentials. Their credentials are not accepted when they are entered. I supsect I have some permission problem. Can you suggest the things I should be checking both on the form end and the SharePoint end?
Owners with full control don't receive this error.
Also, as an owner, I can submit the form without receiving an error. However the form doesn't show up in the library. If I try to resubmit, it tells me the form already exists. However I can't find it.