The Exchange Server Database Utilities (Eseutil.exe) is a utility that you can find by default on your Exchange server in the BIN directory. You can use this tool to perform an offline defragmentation of your Exchange database files, or to repair a corrupted database file if needed. But you can also use this tool to do something completely different, namely, copying files. When running Eseutil in copy file mode, by adding the swith /Y) you can copy large files more efficiently since it will copy files in larger blocks of data. However, you can only copy one file at a time, since it does not accept wildcard characters.