InfoPath Dev

 this sort of functionality will require you to use code to read another infopath form, a work around can be to store the data in some table/list and then in second infopath form read the data and create links

 If their web service is available from your environment, it probably work for the xml, but  the template (xsn) is probably not available from their environment, and what about other data connection?

person B is outside of the intranet as well. so if they were to submit to the database they would get and error because they could not access the database. but when they send the email to outlook mail box that server is within the network.

 It can make sens, I know that  Infopath use some IE dll.

For example, I publish the form to a document library in SharePoint (intranet site). But I have a secondary submit/data connection to submit the data to an external web service managed by another company. Is this possible?

 on person B submit why don't you have two submits, one submit via email and second submit to database.

Bump......

problem only happen in the context of SharePoint. I just saw a few minutes ago that in internet options (IE/Manage add-on) a SharePointXmlOpenDocument (InLaunch.dll) is disable. When i'm logged using my admin account, this dll is enable.. so ?!?! :)  I made a request to security department to enable it and im waiting.  What do ...

 Can you try to save your form with "save as" not publish . And  check if you have the problem ?

The checkbox : Design a form template that can be opened in a browser and InfoPath  (is not checked).  Is there anything else ?