I have an Azure Data Factory pipeline that includes a Web activity. The Web activity sends a request to an Azure Function App. ADF automatically adds an 'Expect' request header. The function app is not designed to handle the 'Expect' request header and subsequently returns an internal failure message (code 500).
I wrote another function app that logs the header values to prove that ADF is adding the 'Expect' request header even for simple requests where the content-type=text/plain and the body="test".
How do I tell ADF not to send the 'Expect' request header?