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I have enabled the client certificate for the function app. Function app endpoints are mainly accessed from the APIM. We are passing certificate from APIM to the backend function app and this flow works for the http triggered function. But in the same function app we do have some event gird triggers and this triggers are falling with forbidden error. How can we pass the certificate from the event grid topic to the subscribers?
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Thanks for reaching out to Q&A.
Please let me know, how you have configured the eventgrid function to serve requests from APIM? When you select Functions in the import API section in APIM, eventgrid triggered function will not show up, only http triggered function would show up.
I will provide an answer based on the response.
@Krishnaraj Poojary , Did you get a chance to look at my previous post ? Please provide your inputs
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(182.40000000000003, 74%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKP%3C/text%3E%3C/svg%3E)
@MughundhanRaveendran-MSFT Only http triggered functions we are using APIM as a gateway. For eventgird trigger we are not using APIM.
All the hhtp triigered funtions we are callling from APIM and In APIM we have option to include certificate but for Event grid triggers as it directly hits the function app and it fails with 403 error. And I couldn't find any option to add certificate in Event grid topic - subscriptions
Please look into this outbound server auth : https://learn.microsoft.com/en-us/azure/event-grid/edge/security-authentication#outbound-server-authentication
Hi @MughundhanRaveendran-MSFT ,
Thank you for the response. I will try this solution
I tried this. But handshake validation is not working.
Created new subscriiotion using webhook as endpoint type. I used advanced editor options to set the below properties
{
"Env": [
"outbound__webhook__httpsOnly=true",
"outbound__webhook__skipServerCertValidation=true",
"outbound__webhook__allowUnknownCA=true`enter code here`"
]
}
