My company has been previewing DWG files in Internet Explorer by direct pathing to the DWG file, but it no longer works.  I believe we must have had a plug-in (now removed) that was allowing us to view the DWGs in the browser window.  Any idea what I might be missing?

A360 Viewer will do that.https://a360.autodesk.com/viewer

Thanks, but unfortunately we don't use the Autodesk cloud so it won't help us.

Could it have been DWG TrueView then?