I assume everybody had this problem after installing Internet Explorer 7.0 on Server running Exchange 2003 . The problem : When click on "Help" tab in "Exchange" i shows error. The error is due to IE 7.0 mismatch. Solution : Uninstallaing IE 7.0 solves the issue. This issue continues with Exchange 2007 & IE 7.0 ? Anybody tried to access "Help" tab in Exchange ? Regards, Amey.