To change the SE service default port, stop the Redstor Online Backup SE service in the services window from the Control Panel. Also close the Client interface and the exit the System Tray icon. Browse to the folder where Server Edition is installed (default folder is C:\Program Files\Redstor Online Backup\Backup Client SE\) and open the a5backup.properties file.
Edit the entries below:
where 10001/2/3 are the port numbers that you want to use. Each entry should have a different number.
Start the Redstor Online Backup SE service again, open the backup client and confirm that you can initiate a backup.