We have encountered this issue “(413) Request Entity Too Large” while posting data from AIF web-services to AX.
AIF web-service doesn’t allow large data streaming or buffer from AX.
To allow Large Data streaming from and to AX, I have set a parameter maxBufferSize=”6553600″ maxReceivedMessageSize=”6553600″ in HttpBindingBase in web.config of AIF Inbound port.

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