We have a webapp, which is hosted on a normal IIS. Our client wants to host the webapp in a SharePoint page. This is how the page roughly looks:
<sharepoint site> <div> <iframe src="mypage.com" /> </div> </sharepoint site>
As authentication they want to use SharePoint authentication, which gives us a problem. We need to be able to authenticate against the SharePoint from an external site.
Is that possible? If yes how do we build a working solution. If no, are there any other options to use at least the same authentication database like the SharePoint?