Make Identity's field not editable on Angular Web Portal

Btw, One Identity Manager On Demand 9.2

Anyone can help? Thanks

Did you check that the configuration file(s) xxx.ComositionApi.config.json have been placed on the API Server after you have changed your configuration? 

Did you restart the API Server to ensure that the settings are enforced to load?

Identity data / Writable attributes - If we remove the attributes from here then it removes the attributes from "Profile->Main data attributes  "

Identity data / Personal data - If we remove the attributes from here then it removes the attributes  from the Main Data tab of an employee when manager try to view and manage an identity reporting . 

Is there something to configure in the admin portal to make Main data fields not editable without removing them? .  

Identity data / Writable attributes - If we remove the attributes from here then it removes the attributes from "Profile->Main data attributes  "

Identity data / Personal data - If we remove the attributes from here then it removes the attributes  from the Main Data tab of an employee when manager try to view and manage an identity reporting . 

Is there something to configure in the admin portal to make Main data fields not editable without removing them? .  

Administration Portal > Configuration: Web Portal (click on: three dots icon)
Create configuration key
Select where to add the configuration key: API method configuration
Name of the new configuration key: person_masterdata
[Create]

[search] person_masterdata
API method configuration / person_masterdata / Read-only properties

MiddleName
[Add]
[Apply]

Hello Niels,

Thanks , It works. 
And I created new key to make Main data fields not editable by manager too . Name of the new configuration key:person_reports

Hello Niels,

I did add the Api method config ... But it is getting removed after 5 minutes from admin portal. 
And i can see the xxx.ComositionApi.config.json was updated and still holds the method added. But does not exists in the admin portal and the changes have no effect after it vanishes. 

Hello Rakesh,

My first guess, request a hotfix for ID446293 if you are not on 9.2.1
446293 - Some configuration settings of API Servers are not loaded correctly from the configuration files.