Using ADF to extract Teams Call info using Graph API

Looking at the participant api: https://learn.microsoft.com/en-us/graph/api/callrecords-callrecord-list-participants_v2?view=graph-rest-beta&tabs=http ,it needs to be called for each call recording from what I can see, so you would need to retrieve call recording IDs and then iterate over them using the participant api inside a for each loop.

You can't collect outputs from a copy task so as well as the copy task for call records you would need to get the call record IDs separately. You have some options here - run a web activity to call the call records api a second time to retrieve the call record IDs or get the call IDs from the file / table you populated from the call records copy task.

You then need to construct the participant api using the contents of your for each. The api is `/communications/callRecords/{id}/participants_v2` so an expression that is something like `@concat('/communications/callRecords/',item().id,'/participants_v2') could be produced for the copy task url, assuming that the Id is labelled as id in the payload you are iterating over.

Some other things to consider - if you use a second web activity you need to consider that the copy task and the web activity will run at different times and potentially returning different results so I'd be inclined to use the filter to control what is returned by both activities (https://learn.microsoft.com/en-us/graph/api/callrecords-cloudcommunications-list-callrecords?view=graph-rest-beta&tabs=http). You could also reduce the size of the web activity payload by using the $select filter to just return the id.