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Good day, and thank you for the clear explanation of your situation.
Based on the information you’ve shared, it appears that you are attempting to use your school account together with another Microsoft account on the same device. When Microsoft indicates that your school email address “does not exist,” this is commonly related to the sign‑in page being used, rather than an issue with the account itself.
School accounts are classified as work or school accounts and are managed by the educational institution that issued them. As such, they must be accessed through a different sign‑in experience than personal Microsoft accounts.
If a school account email address is entered on the personal Microsoft account sign‑in page (for example, https://login.live.com), it may appear as though the account does not exist, even when the account is valid and active. While this behavior can understandably be confusing, it is expected.
However, if you sign in through Office.com, which is the correct sign‑in page for work or school accounts, and the system still indicates that your account does not exist, this would suggest that the issue is specific to how the account is configured or managed. In that case, I recommend contacting your school’s IT administrator or support team, as they are responsible for managing student accounts and are best positioned to verify the account status or assist with access issues.
I hope this information is useful. Thank you for taking the time to raise this question. If you need any specific clarification or additional guidance, please feel free to let me know, and I’ll be happy to provide further information.
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