Hi Gastón Rodrigo Guevara & Thinh Nguyen,
Welcome to the Microsoft Q&A Forum! Thank you for posting your query here.
This error indicates that the authentication system cannot verify the authority (i.e., the login endpoint), likely due to misconfiguration or network restrictions. Here’s what you can do:
Step 1: Clear Cache & Try Different Browsers
- Clear your browser cache and cookies.
- In Chrome, go to Settings > Privacy and Security > Clear Browsing Data (Select Cookies and Cached images).
- Try using Incognito/Private mode.
- Use a different browser (Edge, Chrome, Firefox).
- Ensure that JavaScript is enabled in your browser.
Step 2: Verify Network and VPN Issues
- If you’re on a corporate network, try accessing from a different network (mobile hotspot or home WiFi).
- Disable VPN (if enabled) and try again.
Step 3: Verify Azure AI Portal and Subscription
- Go to Azure Portal and try logging in there.
- Check if your Azure subscription is active.
- Navigate to Azure Portal > Subscriptions and see if your plan is still valid.
- If you’re using Azure AI Studio, ensure you’re logging into the correct region.
Step 4: Fix the "Untrusted Authority" Issue
If the issue persists:
- Go to Microsoft Entra Admin Center.
- Navigate to Identity > Overview and check if your domain is listed as a trusted authority.
- If it’s a corporate account, ask your Azure AD administrator to verify the login settings.
Hope this is helpful if not can you clear the browsing data and going to the Azure portal via "New InPrivate Window".
Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.