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I'm trying to query two different application insight instances (instance A and B) trough the REST API. I'm using postman to send a GET http request to the API and followed the answer in this post, which was aiming towards the same goal, join request data from different applications insights: https://stackoverflow.com/a/52248597/17161618

Just as it says in the above mentioned post I'm acessing the instance A and passed the authentication through the request header in the format keyA:appIdA,KeyB:appIdB.

I'm sending the following query:" union app("AppIdA").traces,app("AppIdB").traces " and receive the following error: enter image description here

Does anyone know how can I get access to read logs in resource B ?

Alexandre Silva
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I don't think you can run cross-component queries using API keys. You should use AAD (Azure Active Directory) auth. Give AAD app access to both resources. Then you should be able to run such queries.

ZakiMa
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