Cannot start Microsoft Learn exercise

Georgi Pehlev 21 Reputation points

I recently added an .com email as a secondary email to my Microsoft account. A few days after that, I tried signing into Microsoft Learn to continue studying for an exam challenge I signed up for through my company. Now I get an error '<my_primary_email>@Stuff .com is already a Microsoft account. Please try a different email address' upon attempting to review permissions for the sandbox in order to perform an exercise from a Microsoft Learn module. When I click Next, I get another error: 'Someone already has this email address. Try another name or claim one of these that's available' and it suggests that I use another .com address. Up until this point, I never used an .com email to sign into Microsoft Learn.
I tried removing <my_secondary_email> .com as my secondary email from I opened Microsoft Learn in an incognito window. I also tried to open it from another device. I always get the same error. I have 2FA enabled and when I get a prompt to verify my account during sign-in, the prompt is for the correct account - I use <my_primary_email>@Stuff .com to sign into Microsoft services.
I suspect that the Microsoft Learn sandbox invited my .com account to the Microsoft Learn Azure AD tenant.

Azure Active Directory
Azure Active Directory
An Azure enterprise identity service that provides single sign-on and multi-factor authentication.
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  1. JamesTran-MSFT 26,616 Reputation points Microsoft Employee

    @Georgi Pehlev
    Thank you for your post!
    Microsoft Learning/Exams are currently not supported here on the Q&A forums, our Microsoft Learning/Exam experts are actively answering questions in dedicated forums here:

    Thank you for your time and patience throughout this issue.


    Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.

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  1. Georgi Pehlev 21 Reputation points

    Hi James. Thank you for pointing me to the correct community!

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