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How to get Access token via HTTP action in Flow

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Posted on by svp95bos

I'm trying to authenticate against an App Service that I have defined in Azure Active Directory. When accessing it, I first get the access token and the continue with the rest of the OAuth procedure.

The problem, however, is that I can only get the token when posting the request via Postman. When I try to call the same URL, with the same data using an HTTP action in flow, it fails:

{
 "error": "invalid_client",
 "error_description": "AADSTS70002: Error validating credentials. AADSTS50012: Invalid client secret is provided.\r\nTrace ID: 67250fbf-ad20-47f1-b3a3-dbce1e813600\r\nCorrelation ID: f9eaaa13-cee3-4f5c-a96a-6846c4392dd9\r\nTimestamp: 2018-01-17 12:21:51Z",
 "error_codes": [
 70002,
 50012
 ],
 "timestamp": "2018-01-17 12:21:51Z",
 "trace_id": "67250fbf-ad20-47f1-b3a3-dbce1e813600",
 "correlation_id": "f9eaaa13-cee3-4f5c-a96a-6846c4392dd9"
}

This is how it is set up in Flow:

WCjfx

When executed in Postman it works just fine:

wx6SF

I cannot figure out why this doesn't work when running the request from within a Flow. Am I missing something in the HTTP action card configuration?

Kind regards, Peter

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Using connectors

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svp95bos 37 on at

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I found the reason for this not working. I had to fully URL encode the value for client_secret.

/Peter

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Community Power Pla... on at

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I am getting same error, but could not understand your resolution. could you please help in 'fully URL encode the client secret'. how do i do that or a screenshot of your working flow action

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abd3127 320 on at

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@svp95bos@Anonymous
i am getting the same error.
Can u explain how u solved it?

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Community Power Pla... on at

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Hi,

Please read this article https://sharepointmadeeasy.blogspot.de/2018/02/microsoft-flow-http-rest-api-invalid.html

hope it helps.

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Dean Gross 242 on at

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Thanks, this solved my problem with the missleading error message i was getting from the Client Secret value

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KarthikKota Microsoft Employee on at

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Great, thank you.

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rehanmemon on at

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Please go through the Blog explaining the process to Generate Access Token in Power Automate

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Kankamon02 15 on at

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This Article is very helpful Generate Access Token in Power Automate
I solved my issue because of this article

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