APIM requests not showing downstream requests in application insights In Application Insights, if you are not seeing the telemetry for the backend service being called by APIM, it could be you have the wrong type of correlation type option set under that API’s settings in APIM. The correct setting, for newer web apps that use the latest open telemetry or application insights nugets should be W3C . The default value is Legacy so you will need to change it to W3C. Without that correlation, the appropriate headers will not be included in the request to the backend service from APIM and the two parts of the request would appear as separate flows inside Application Insights.
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