Exchange 2010 EMC works fine until a day when you launch it and get the error as shown below:

There are 2 steps to fix this and a workaround to troubleshoot further.


Step 1 is to open up the registry and navigate to the following key:

  • HKCU\Software\Microsoft\Exchangeserver\v14\AdminTools\NodeStructureSettings

Under the NodeStructureSettings key delete the value NodeStructureSettings (shown below)

Step 2 is to remove the cached information under the user directory:

  • C:\Users\<Username>\AppData\Roaming\Microsoft\MMC

After you have completed these 2 steps then try launch the EMC again. If it still fails you can continue to the workaround and carry on troubleshooting.


Launch the EMC again and click on Microsoft Exchange in the top left hand corner. You will see an option “Add Exchange Forest…”, click on this, a new window will appear.

Enter in a name and then under the url you can enter the following:

  • http://FQDN ServerName/PowerShell

Once you click the OK button you can now click on the name you just gave and you should see the following:

The EMC is now getting all the information for the current user. Once done you should be able to browse the EMC like before:

Hope it helps.