I have multiple ASP.NET applications running in IIS, which I would like to package and deploy to SharePoint 2013 server as apps.
The problem is, that these applications are developed by other companies, so I don't have access to the source codes, thus I cannot create a package of the application in Visual Studio.
Is it possible, to take (basically) any ASP.NET application and make it a SharePoint app and deploy it as Provider-hosted app? Please leave aside issues like authentication to SharePoint, branding...
Is it possible to create an app package without the Visual Studio? If I have 10-30 applications, it would be nice to make it automated.
The goal I am trying to achieve is to integrate existing applications into SharePoint, so it can be used as a portal, one point of access for other applications as well.
Thank you