I bumped into this error message with a customer MOSS + Forms Server installation, that had it's key recently upgraded to an enterprise RTM version from a Beta 2 Technical Refresh (B2TR) key. Upon opening InfoPath-forms via Forms Server users would get...

I needed to build up MOSS 2007 portal that would integrate some of the existing Line Of Business (LOB) applications. We also needed to use SSO, because some of the applications weren't AD-enabled. To use SSO, you can create your own custom web part and...