Defining File Groups
You want to create a file group to be used within Windows Server 2003 R2's File Screening capabilities.
Using a graphical user interface
Using a command-line interface
The following command will create a file group called Mailbox Files that contains four types of files:
> filescrn filegroup add /filegroup:"Mailbox Files" /Member:"*.mbx|*.inbox|*.pst|*.ost"
File groups are the building blocks for the file-screen capabilities that are built into the file server role in Windows Server 2003 R2. You'll use file groups to define a file screen, a file-screen exception, or a storage report for your file server. It's important to note that the file group itself does not define what should be done with those files: if you have a file group configured for *.mp3 files, a file screen using that group would prevent MP3 files from being saved to a particular directory, while configuring a file-screen exception using this group would allow MP3 files to be saved in the directory that you specify.