Creating a client and setting up the client attributes 

To create a client you have to maintain T000 table. From 3.0 onward, transaction SCC4can be used to maintain T000 table. Also you can chose Administration-> Client admin -> Client Maintenance from the initial screen to do the same. In client table T000, SAP system displays all the clients available, their names, currency used and when the client was changed last. If the system is in display mode then you must change it to the change mode by selecting the display/change icon to create a new client. When you click display/change button, a warning is displayed as “Warning: the table is client-independent”. The “New entries” icon should be clicked to create a new client.

In the new client creation screen to define a new client you must fill all the required entries. The client number and the name are entered first. Then in the second line the location of the SAP system is defined.

Logical system is defined next.  SAP uses logical system concept in ALE (Application Link Enabling), workflow and EDI areas. The logical system must be unique through out the company and any other ALE system group can not use it. You must be careful changing the logical system entry. SAP treats a logical system as a client. You can use transaction BD54 to create a logical system and then enter that entry in the logical system box while creating a client. 

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What is SAP Client?

A client is organizational and legal entity in the SAP system. All the business management data is protected here because other clients can not access them. The main objective of the client is to keep the data isolated. The data in a client can be only visible within that client; it can not be displayed or changed from another client. In a physical SAP system there can be multiple clients. Each of these clients can have different objective or each client represents a unique work environment. In a development environment one client can be used as sandbox client (developers learn how to configuration using SAP environment), one can be used as prototype client (users do the customizing according to the company’s requirements and testing) and another one can be used as the master development and configuration client (where the final configuration is done). A client has its own set of tables and user data. To know whether a table is client dependant or independent you can search for a field MANDT. The client dependant tables always include the client field ‘MANDT’ as a part of the primary key. There can be multiple clients in each of the system of SAP system landscape as we have already seen in chapter 5. It is better to understand the customizing process in the CTS pipeline before designing a good client strategy for the SAP systems. Customizing is a method in the SAP R/3 system that helps the user to configure the functionality from SAP, according to the customer requirements. When the SAP objects are just used by only one client, we define them as client dependant data. There are some objects as ABAP/4 programs, which are used by all the clients in a SAP system. Those objects are called client independent data. The functional changes resulting from customizing can be client specific (client dependant) or general (client independent). You must know the fact that client independent customizing can create problems if the authorizations and the client strategy are not defined properly. For example if you have three clients in a development environment then the role of each client should be defined properly. One of these three clients should be used for client independent customizing and in other clients, users will not have the authority to do any client independent configuration. 

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