Cannot Access Microsoft Learn Sandbox – "Selected user account does not exist in tenant 'Microsoft Services'" Error

Question

Hello!

I am trying to complete the "Exercise - Create a DNS zone and an A record by using Azure DNS" on Microsoft Learn (Link).

However, I am facing an authentication issue when accessing the sandbox. I get the following error message:

"Selected user account does not exist in tenant 'Microsoft Services' and cannot access the application '18fbca16-2224-45f6-85b0-f7bf2b39b3f3' in that tenant. The account needs to be added as an external user in the tenant first. Please use a different account."

Account Details & Context:

• My Microsoft Learn account is registered with my Gmail account, and I have been using it for years without any issues.
• The same Gmail account is also my Azure portal account, which I use for Azure services.
• I do not have an active Azure subscription right now, but Microsoft Learn sandboxes should not require one, as they are self-contained.

Thanks in advance.

This question is related to the following Learning Module

Answer 1

Hello ΑΓΓΕΛΟΣ ΓΕΡΟΥΛΑΝΟΣ

Thanks for your question.

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