User administration - SU01

User administration is creation and maintenance of the users by the system admisitrator to administer the rights for the individual users within a system.It performs all tasks that are relevant to user management and role assignments.

- User creation
- User modification
- User deletion
- Lock & Unlock
- User copy
- User password reset

Client 
It is a independent space within a system.
It is represented by a 3 digit number 000-999
000,001 and 006 are the default clients in non IDES system (International demonstration & education system)
000,001,066,800,810,811,812 are the default clients in IDES system.

Purpose
Organization of data is done easily
Max number of client that can be checked is 1000

Client data
1. Client Independent data(standard data) Ex  tcodes,ABAP code
2. Client dependent data(Customized data) Ex Users,transactions data,business data.

Tcodes related to this concept
SCC4 - client creation
SCC5 - client deletion
SCCL - Local client copy 000-100 into the same system
SCC9 - Local remote copy 000-100 different system

- Do not copy data into SAP standard default clients.
- Create a separate client & copy all the data from the default to the created client.

SAP User Types :

1. Dialog - Default user type,interactive user,password parameters are applied,GUI logon applied. Ex : All employees

2. Service - used for multiple dialog platform,password parameter is not applied,GUI logon allowed.
Ex : FFID

3. System - used for internal communication ,password paramters are not applied,GUI logon not allowed. Ex : Background, internal RFC

4. Communication - used for external communication,password parameters are not applied,GUI login not allowed
Ex : RFC's

5. Reference - used for providing extra access to dialog ID's when its access limit no password is required,cannot login through GUI.

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