If the J100 telephone does not receive the correct settings , it will not display the IP Office specific menus. Principally, the Features menu is not shown on the main screen.
If using static 46xxsettings.txt file, temporarily remove it from the IP Office and using a browser, request the system's auto-generated version of the 46xxsettings.txt file. Compare the two files.
Whilst you could now update your static version of the 46xxsettings.txt file, Avaya recommend that you continue to use the auto-generated file and put any custom settings into a 46xxspecials.txt file.