You must close all dialog boxes before you can close Exchange Management Console

Exchange 2010 – “You must close all dialog boxes before you can close Exchange Management Console”

Problem

Seen on Exchange 2010 SP1 running on Windows Server 2008 R2.   Whenever you attempt to close the Exchange Management console you see the following error. You must close all dialog boxes before you can close Exchange Management Console Even though there are no dialog boxes open!

Solution

Essentially this is a Bug in Internet Explorer 9. To stop this happening you have two choices. Option 1 Disable IE ESC 1. Launch Sever manager, and scroll down till you see “Configure IE ESC”.   2. Set IE ESC so that it is disabled for administrators > OK.   3. the Exchange Management Console will now close properly. Option 2 Uninstall Internet Explorer 9 A Little drastic, but if you DONT want to alter IE ESC, then you need to uninstall IE9. WARNING THIS REQUIRES A REBOOT 1. Start > in the search/run box type appwiz.cpl{enter} 2. Click “View Installed Updates”. 3. Locate “Windows Internet Explorer 9”, and uninstall it.