Function and Role of User Types

In "USER MAINTENANCE- SU01" --> in the "logon tab" there are 5 different "user type"

1. dialog
2. system
3. communication
4. service
5. reference

Kindly mention the function and role of all the above mentioned user types specifically and hows is one user type different from another.

These are as follows:-

1. Dialogue:-

For this kind of users:-
GUI login is possible.
Initial password and expiration of passowrd are checked.
Multi GUI logins are checked.

Usage:- These are used for GUI logins.

2. System

For this kind of users:-
GUI login is not possible.
Initial password and expiration of passowrd are not checked.

Usage:- These are used for internal use in system like background jobs.

3. Communication

For this kind of users:-
GUI login is not possible.
Users are allowed to change password through some software in middle tier.

Usage:- These are used for login to system through external systems like web application

4. Service

For this kind of users:-
GUI login is possible.
Initial password and expiration of passowrd are not checked.
Multiple logins are allowed.
Users are not allowed to change the password. Only admin can change the password

Usage:- These are used for anonymous users. This type of users should be given minimum
authorization.

5. Reference

For this kind of users:-
GUI login is not ible.
Initial password and expiration of passowrd are not checked.

Usage:- These are special kind of users which are used to give authorization to other users.