This is to help out anyone that receives the following error with Microsoft Exchange 2007. When you are in the Exchange Management Console, and click Toolbox and Queue Viewer, the following error is displayed:
MMC cannot open the file {Exchange Install Folder}\Bin\Exchange Queue Viewer.msc.
This may be because the file does not exist, is not an MMC console, or was created by a later version of MMC. This may also be because you do not have sufficient access rights to the file.
To resolve, assuming you have the proper authority, delete the following file:
C:\Documents and Settings\{yourusername}\Application Data\Microsoft\MMC\Exchange Queue Viewer
