Send Event to Event Grid Topic from ADF Web activity using Managed Identity

Harsh Ghatge 1 Reputation point


I wish to send an event from ADF "Web" Activity to event grid topic. I managed to do it with sending "aeg-sas-key" from web activity as documented here.
However, when I tried to achieve the same through ADF Web activity without using "aeg-sas-key" and Authentication as managed identity


But it gives me below error:

{ "error": { "code": "Unauthorized", "message": "Request has an unsupported Authorization scheme:Bearer. Authorization scheme must be SharedAccessSignature. Report 'a2af905c-e3ca-401a-be09-3f0b3c6b7d4e:8:5/20/2021 2:00:24 PM (UTC)' to our forums for assistance or raise a support ticket."

I have added the managed Identity Application of ADF to Event Grid topic with contributor role, but it still does not work. Am I missing something?


To be short, Can you explain how to connect to Event Grid topic from ADF Web Activity using Managed Identities Authentication?

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2 answers

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  1. HimanshuSinha-msft 19,281 Reputation points Microsoft Employee

    Hello @Harsh Ghatge ,
    Thanks for the ask and using the Microsoft Q&A platform .
    Looking that the document here and also looking at the error at this time only access key and SAS are suported for EG .


    Please do let me know how it goes .
    Please do consider to click on "Accept Answer" and "Up-vote" on the post that helps you, as it can be beneficial to other community members

    1 person found this answer helpful.
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  2. Harsh Ghatge 1 Reputation point

    Hello @HimanshuSinha-msft

    Thanks for letting know the link. I could see SAS & AccessKeys are the ways to authenticate while sending events to event grid but I did not see anywhere which states that ADF integration with EG using Managed Identities is not supported.
    I believe there must be some way we could authenticate against event hub using MI, since both EG and ADF service are MI enabled