[Hrundi]

Microsoft provides free* virtual machines, each with a specific version of IE. Not quite the same thing though, but they are actually pretty cool.

http://www.modern.ie/en-us/virtualization-tools

* not sure if an enterprise can use them though.

[saraid216]

If you go up to the main site, you'll notice there's a "free 3-month trial of BrowserStack". I think this effectively means that enterprise is fine.