Hi,
In A2A, integration is done within the same landscape and within the same company.
In B2B,the integration is done between one business partner to another business partner over different landscape.
When two applications in a company communicates with each other we call it an A2A scenario and if its across Companies we call it B2B or buisness to buisness.
Consider a Company, it may use XI for integrating its ERP system with its HR system. As both systems are in the same landscape, it becomes an A2A.
Likewise, if the Company want to have transactions with another organization and XI is used to Integrate these systems, it becomes a B2B as you use it to integrate 2 different Businesses in different landscapes.
But exceptions are always there....suppose company A sends orders over web(HTTP or SOAP) to its vendors,now both these companies are different,they have different landscape,but still its A2A.
Regds,
Pinangshuk.
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