Error : AADSTS900561: The endpoint only accepts POST, OPTIONS requests. Received a GET request while retrieving access token

Question

I am trying to get access token using device_code, but when I send the http request to the authorization server then I am getting below error message -

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AADSTS900561: The endpoint only accepts POST, OPTIONS requests. Received a GET request.*  

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Please help me solve this issue. I am using below URL for sending the http request from the browser-

https://login.microsoftonline.com/<tenent_id>/oauth2/token?grant_type=urn:ietf:params:oauth:grant-type:device_code&client_id=<client_id>&device_code=<device_code>

Please let me know if you need any other information from my side.

Answer 1

Hi @Prabhat Gupta ,

The AADSTS900561 error typically occurs when 3rd party cookies are being blocked by certain browsers.

If you are using Chrome, you may need to add , you may need to add https://login.microsoftonline.com to your list of trusted sites.

In Chrome, go to:

      Settings – Advanced – Content Settings  
      Cookies – Allow – ADD – “login.microsoftonline.com”  
     Unsandboxed plugin access – Allow – ADD – “login.microsoftonline.com”  

You may also need to add "https://autologon.microsoftazuread-sso.com/"

In addition, if you haven't done so already, you should go to Chrome > Settings > Cookies and other data and unselect "Block third party cookies".

If none of these steps work, you can go to the nuclear option and clear your cache and get rid of all cookies. While killing the browser cache can be inconvenient, it is one way to resolve this issue.

If none of these options work, feel free to reach out to me and I will be happy to continue troubleshooting over email or by opening a support case.

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If the information provided was helpful, please remember to "mark as answer" so that others in the community with similar questions can more easily find a solution.

Answer 2

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