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Passing Headers Between HTTP Calls

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Posted on by timrodman

Does anyone know if anything changed in the Microsoft Flow service recently related to passing headers between http calls?

The following was working a couple of weeks ago, but now the HTTP 2 step fails with "you are not logged in" which I'm pretty sure is related to the authentication headers from the HTTP step not getting passed along correctly.

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eliotcole 4,218 Super User 2025 Season 1 on at

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Re: Passing Headers Between HTTP Calls

3 years, huh?

Anything on this, Microsoft?
timrodman 21 on at

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Re: Passing Headers Between HTTP Calls

I posted about this issue in a forum dedicated to the API that I'm using (click here). If you scroll to the bottom, you'll see that another user's Flow is now broken too, but it was working previously.

Also, my API is installed locally so I know that it hasn't changed.

The only thing that could have changed is the Flow service that I can think of.

There isn't a way to run something under an older build of the Flow service is there?
timrodman 21 on at

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Re: Passing Headers Between HTTP Calls

Hi Kris,

Sure thing, but I'm not sure it will be much help because the error message is coming from my application.

Here is a screenshot of the whole flow:

The HTTP step runs without any errors:

But the HTTP 2 step gives the "You are not logged in" error message
v-xida-msft on at

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Re: Passing Headers Between HTTP Calls

Hi @timrodman,

Could you please show a bit more about your error message?
The error message told that there is something wrong with your authentication of HTTP request.

I have made a test on my side and the issue is confirmed on my side. I agree with your thought that the Cookies don’t get passed along correctly.

Besides, I have searched released notes of Microsoft Flow and don’t find any changes related to passing headers between HTTP calls.

More details about the release notes of Microsoft Flow, please check the following document:

What’s new

Best regards,

Kris
timrodman 21 on at

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Re: Passing Headers Between HTTP Calls

I should point out that headers might not actually be the right thing. Maybe it's cookies. I'm able to successfully do this in Postman, but it seems like the authentication information is automatically handled for me based on the screenshot below. So maybe the real question should be if anything has changed related to passing cookies between http calls?

It was working though a couple of weeks ago. That's the part that has me confused.