Command-line arguments for FlexEngine take precedence over settings configured through Group Policy. For instance, if you set the log level to ERROR through policy, but specify -l DEBUG on the command-line, the latter is used.
You can also reset an argument that is configured through policy, in effect making it unconfigured, by appending a hyphen (-) to the command-line argument. For instance, if you have configured a backup path through policy, but want to run an export without creating backups, you can specify -b-.
You can reset the following arguments: -S, -R, -b, -B, -Bd, -C, -c, -F, -M, -L, -H, -v, -f, -l, -rw, -rk, -rm, and -ra.