Aif steps.

if any one know about aif send me the creation of aif steps.

technet.microsoft.com/…/gg731810.aspx

Along with what Kranthi Mentioned, these will help too.

https://www.dynamics101.com/creating-document-inbound-aif-service-microsoft-dynamics-ax-2012/

http://daxdude.blogspot.com/2018/07/create-ax-2012-r2-aif-webservice-step.html

https://stoneridgesoftware.com/understanding-aif-services-for-dynamics-ax-integration/

https://dynamicserppros.com/creating-an-application-integration-framework-to-microsoft-dynamics-ax-dax-2012/