Autodesk Exchange AutoCAD Server Connection Unavailable we are seeing this error on a few of our 13 workstations. After giving this issue some thought http://forums.autodesk.com/t5/Autodesk-Inventor/In
What are the Autodesk products getting hung up on in IE9?
Solved! Go to Solution.
We officially support only IE 8 for 2012 products. However IE 9 might work well. Since its not tested officially, there might be some stability issues while using it. IE 9 was released after the launch of 2012 products.
Hope it helps.
Manufacturing Support Specialist