What are Legacy Systems Interface and Middleware in SAP

What are Legacy Systems, Interface and Middleware in SAP.

In this section I would like to explain how data will get transferred from legacy to S4 Hana with the help of middleware and interface also explained in diagram. Afterwards you get to know the Legacy Systems, Interface and Middleware.

Diagram represents Conversion to S4

Legacy system:

Legacy system means, it is a software system(can be specifically developed) which is used by the company to deal with regular activities of the business.

In other words, In legacy systems, business do invoice postings, make payments to vendors, receive payments from customers etc.

Examples of Legacy systems:

• SAP R/3 (SAP older version)
• HR system
• Oracle
• Merlin etc.

Middleware:

Middleware is an integration platform which connects the one or more Legacy systems to SAP system by mapping values of source system and target system.

Interface:

• Middleware just helps to integrate values but to transfer the data from legacy to S4 needs an interface.
• It is one of the developments in RICEFW concept (I -> Interface).
• Interface means, it will help to transfer any transactional or master data from legacy systems to S4 Hana system Or vice versa.

SAP FICO Configuration topics:

• SAP Finance Enterprise structure: Click here
• SAP Finance GL Accounting: Click here
• SAP Finance Accounts Payable: Click here
• SAP Finance Accounts Receivable: Click here
• SAP Finance Bank Accounting: Click here
• SAP Finance New Asset Accounting: Click here
• How to Create a Controlling area in SAP: Click here
• SAP Controlling – Cost Element Accounting: Click here
• SAP Controlling – Cost Center Accounting: Click here

What are Legacy Systems, Interface and Middleware in SAP