EXFO FTB-500 - Manual (Page 187)

Accessing Your Unit Remotely
FTB-500 179
Working with Remote Desktop
9. From the list of users, select the user that you have just added, and
then tap OK.
10. Repeat steps 7 to 9 with all the users to which you want to grant access
rights.
11. From the Remote Desktop Users dialog box, tap OK.
12. From the System Properties dialog box, tap OK to confirm the
changes and return to the System Settings window.