This will assume a need to limit Users to Alias Names.
For any Role assigned to Users who should only see Item Name Alias values:
- Remove the Role Right 'View Item Display Name or Name Alias' from the Role assigned to the user.
- Add the Role Right for 'View Item Name Alias Only' to the Role Right assignments.
Any user assigned to a Role that only has the 'View Item Name Alias Only' Role Right will only see Item Name Alias values.
The user won't have to change their Display Settings due to this configuration removing that choice for the users with the Role assigned.
Any Roles assigned to Users that should have choice between Display and Alias name values, should be assigned the Role Right 'View Item Display Name or Name Alias'.
Any Role assigned to Users that should only see Display Name item names should be assigned the 'View Display Name Only' Role Right.
The Administrator Role is different in that it is required to have access to both options. It must have the 'View Item Name Alias Only' Role Right option available as a Role Right and is the only choice available for that Role.