DO NOT, perform this process unless you have Box Auth Error 20, update client reports "use Update Firmware to authorise UFS !" or you are advised to do so.
1. Run the update client.
2. Select your language.
3. Click "Next".
4. Wait until the "Update UFS Firmware" button is enabled and then click it.
5. Select req.fbi file, you will need to get this file from the support area.
6. After a few seconds the process will complete and create a file called ******.req. (where ****** is your UFS serial number)
7. Send this file to your UFS reseller.
8. When you receive ******.fbi from your UFS reseller, perform steps 1-4 above.
9. Select ******.fbi
10. After a few seconds your box will be authorised.
Your UFS reseller is the only person who can help with this process, do not ask here in the forum, we will not generate ******.fbi files for you.
NOTES:-
1. the ******.fbi file sent by your UFS reseller is one time use only.
2. once you have made the ******.req file, do not perform any other steps on the box, since this will cause the ******.fbi file to be out of sync.