Can't start Learn Sandbox when logged in with my account

C S 0 Reputation points
2025-01-27T13:24:59.0066667+00:00

Hello,

I get the following error message when I try to start the Learn Sandbox for the AZ-900 Learning Path:

"The selected user account does not exist in the “Microsoft Services” client and cannot access the “18fbca16-2224-45f6-85b0-f7bf2b39b3f3” application in this client. The account must first be added to the client as an external user. Use a different account."

I don't get it, is there any workaround to use the Sandbox with my current account instead of having to create a new one?

Thank you.

This question is related to the following Learning Module

Azure Training
Azure Training
Azure: A cloud computing platform and infrastructure for building, deploying and managing applications and services through a worldwide network of Microsoft-managed datacenters.Training: Instruction to develop new skills.
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  1. VarunTha 12,190 Reputation points Microsoft Vendor
    2025-01-27T19:26:08.2566667+00:00

    Hi C S,

    Thank you for contacting us from the Microsoft Q&A forum.

    I appreciate you reaching out regarding the issue you are experiencing with accessing the Learn Sandbox for the AZ-900 Learning Path. I understand how frustrating this can be, and I'm here to help you resolve it.

    The error message you got shows that your account is not recognized as an external user in the Microsoft Services client, which is necessary to access the sandbox. Now, one of the options could be creating a new account; however, I'd like to propose a few troubleshooting steps that might help you use your current account:

    1.Log Out and Clear Cache: Please log out of all tabs in your current browser and clear your cache. After doing this, try logging in again using your Learn ID credentials.
    2.Incognito/Private Browsing: If the issue persists, please sign out of your current browser session and attempt to log in from an incognito window or private browsing mode. This can sometimes bypass any session-related issues.
    3.Different Browser: Alternatively, you may want to try accessing the Learn Sandbox using a different web browser to see if that resolves the issue.
    4.Account Selection: If you have multiple accounts associated with your Microsoft services, please ensure that you have selected the correct account before creating resources in the portal. The Azure portal typically defaults to the Default Directory, which may not have the necessary permissions.
    5.Account Type: You can sign up for Azure with a personal Outlook or Microsoft account, which may be easier to use and will not have all the restrictions associated with other email addresses.

    If you are still having trouble, please let me know, and I will be happy to assist you further.

    If you have found the answer provided to be helpful, please click on the "Upvote and Accept Answer" button so that it is useful for other members in the Microsoft Q&A community.


  2. Abiola Akinbade 23,055 Reputation points
    2025-01-28T07:31:02.72+00:00

    Hello C S,

    Thanks for your question.

    This happens if If your account is associated with another tenant (e.g., your company’s), the sandbox environment can’t grant access. Personal accounts often resolve this automatically

    Try the following:

    • Completely sign out of the Microsoft Learn portal, Azure portal, and any other Microsoft services in your browser.

    Use an InPrivate/Incognito browser window to avoid cached credentials.

    • Sign back in with your Microsoft Learn account (the one you’re using for training).
    • Ensure you’re using a personal Microsoft Account (e.g., @outlook.com, @hotmail.com, etc.) and not a work/school account.
    • Old cached credentials or tokens might interfere. Clear your browser’s cache and cookies for microsoft.com, azure.com, and learn.microsoft.com.
    • Sometimes browser extensions or settings block access. Test with Edge, Chrome, or Firefox.

    You can mark it 'Accept Answer' and 'Upvote' if this helped you

    Regards,

    Abiola

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