Most of settings are located under \AppData\Roaming\Avaya\one-X Agent\2.5\Profiles\
\Settings.xml If to set “ReadOnly” attribute to “true”, then corresponding setting will be grayed. Some other settings (like AuxReasonCodes, etc.) can be disabled via other xml files under \AppData\Roaming\Avaya\one-X Agent\2.5\Profiles\
\ folder. For example, if to set ReadOnly=true for “Settings->Login” (see above screenshot), then System Settings -> Login window will look like shown here (settings are not editable):