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Hello Fara Mirado Andriamamonjisoa,
Welcome to the Microsoft Community.
From your description, I understand that you want to log in to your BYU portal through your Microsoft account, but you have found that the account is forcibly associated with another account. I understand your confusion regarding this issue.
May I ask if you mentioned that this account is associated with another account? Do you mean that you cannot log in to your current Microsoft account, which is why you are unable to log in to the BYU portal? If my guess is incorrect, please correct me.
If you are unable to log in with a Microsoft account, have you set up other login methods such as phone numbers, aliases, etc? If you have set it up, you can try using these methods to log in.
If you do not have these verification methods, you can visit the following link to see how to retrieve your account.
I can't sign in to my Microsoft account - Microsoft Support
If you can log in normally but will be redirected to another account when using your current account, please try the following:
- Please try clearing browser cache and cookies.
Disclaimer: The browser automatically saves temporary internet files to help speed up page loading. Clearing this cache can sometimes solve the problem of page
Face display issue. Please backup important data, such as bookmarks, to avoid data loss.
- Try logging in using browser privacy mode or incognito mode.
Visit the Microsoft Account Management page:
Log in to Microsoft Account Management and check if the wrong email is bound. If so, remove the incorrect associated account.
Microsoft account | Sign In or Create Your Account Today – Microsoft
We look forward to hearing from you!
Best regards,
Lizzie-Z| Microsoft Community Support Specialist