Adaptive Cards Error: “The remote endpoint returned an error HTTP 401."

[danielledavid]

Hi All,

When trying to send an adaptive card with Action.Http through Power Automate, the first flow works perfectly, sends the email, I type in the information I need to send back, but when I go to hit submit, it returns the error: “The remote endpoint returned an error HTTP 401.". However, I checked the 2nd flow which receives the Http request on Postman and everything is working on that end as well. I registered my team alias to send emails and that was approved so I am not sure why this is happening. Any help would be much appreciated.

Thanks!

[#2]

Yes same issue here. I registered everything properly with the originator and everything. I'll see if I can reach out to microsoft.

[#3]

@danielledavid 

I too faced this problem.  It was resolved after adding an empty Authorization header.

The When a HTTP request is received trigger does not expect any credentials, but Outlook automatically sends out a bearer token when you submit an Actionable Message by default. This will lead to a HTTP Unauthorized error message

To avoid this, you must provide a Header with an empty Authorization token inside:

1 2 3 4

"headers": [ {   "name": "Authorization",   "value": "" } ]

Source article:

Custom Actionable Messages with Microsoft Flow – part 2 – Getting the response - About365

[#4]

I faced the same issue. Thanks for the help and saving of time !