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If you have installed Internet Explorer 9, and you use Exchange 2010 SP1, you may face the problem that you cannot close the Exchange Management Console (MMC). The error you get is as follows:
“You must close all dialog boxes before you can close Exchange management console”
In Exchange 2010 you may experience a less responsive Exchange Management Console (EMC). There are a few settings that may improve the speed of the EMC. Below are some actions and/or changes that you can do to resolve the issue.
After a fresh installation of Exchange 2007, the Exchange Management Shell may be found very sluggish. This is because of a damaged configuration setting during installation. The script below boosts the performance of the EMS startup dramatically.
To run the script, do the following: