How to manage security field in Dynamics 365?

In this Post , we talked about how to create the security in d365…etc

Many customers need to control some fields for users.

for example:: user A can see the credit limit for customer and user B can’t see it 

 In AX 2012, you can do that by using override permission button for a specific role as the below

just select your table and uncheck don override, then select your filed and assign…