ForeFront TMG does not work after Windows Updates (Internet Explorer 9.0)

A few weeks ago I was finally able to install some updates on my ForeFront TMG server, so I installed SP1 of Windows Server 2008R2, all other updates and Internet Explorer 9.0. After noticing my internet connection didn't work anymore I logged in on the server and wanted to check what was wrong using the Management Console. This is when I noticed the ForeFront TMG Management Console didn't work anymore. Every treenode I selected resulted in an alert message stating ‘Member not Found’, ‘Refresh failed’, etc. Read more →