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How to Fix Microsoft Entra Error AADSTS900561 on Adidas Locker Room
Question details
The user is encountering the AADSTS900561 error code when attempting to sign in to the Adidas Locker Room website using Microsoft Entra ID.
- Product
- Microsoft Entra ID
- Device & OS
- not provided
- Scenario
- Attempting to access and authenticate into the Adidas Locker Room portal.
- Observed behavior
- The authentication flow fails with error AADSTS900561, indicating that a server endpoint expecting a POST request received a GET request instead.
Before troubleshooting this authentication error, ensure you have noted your exact error correlation ID and timestamp, but do not share passwords or sensitive credentials.
Consult the Microsoft Learn Q&A Entra Forum
Since this error involves incorrect request methods in the backend authentication flow, getting specialist help from Microsoft is the most effective approach.
Error AADSTS900561 means an endpoint designed to accept POST requests received a GET request. This typically requires a deep investigation of the authentication redirect or sign-in flow by administrators or identity specialists.
Open your browser and go to the official Microsoft Learn Q&A platform.
Search for the 'Microsoft Entra ID' forum section to ensure your question reaches the right authentication specialists.
Create a new question detailing your sign-in issue with the Adidas Locker Room site. Include the specific error code (AADSTS900561), correlation ID, and timestamp.
Clear Browser Cache and Retry
Sometimes stale cookies or cached redirects cause the browser to send a GET request instead of properly submitting a POST form.
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Frequently Asked Questions
What does Microsoft Entra error code AADSTS900561 mean?
This error indicates that an authentication endpoint on the server, which was strictly expecting a POST request with specific form data, received a GET request instead, causing the sign-in flow to instantly fail.
Can I fix the Adidas Locker Room sign-in error myself?
Usually, this is a configuration issue on the website's backend authentication flow. However, clearing your browser cache or trying an incognito window can occasionally resolve client-side redirect glitches causing the error.
Where is the best place to get help with Microsoft Entra ID errors?
The Microsoft Learn Q&A forums are closely monitored by identity and authentication specialists who can help diagnose specific Entra ID sign-in flow and endpoint issues.
Why did my browser send a GET request instead of a POST request?
This can happen due to incorrect redirect configurations on the web server, expired user sessions, or aggressive browser caching that alters the intended submission method during a multi-step login process.
