To link your work email with personal email to sit for a Microsoft certification exam, you need to ensure that both emails are associated with the same Microsoft account. If you are receiving an error message that says "email already linked to a certification," it means that the email you are trying to use is already associated with a certification profile. You can only link one certification profile to your Microsoft Learn account.
To resolve this issue, you can either use the email associated with your existing certification profile or contact the Microsoft certification support team to merge your accounts before connecting to Learn. Once a certification profile is connected, other certification profiles cannot be connected in Learn—you can only merge into the connected profile.
To register for the AZ-400 certification exam, you can follow the step-by-step instructions provided in the Microsoft Ignite Cloud Skills Challenge 2021: Free Certification Exam here.
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