After using first time the passcode to access my outlook email account, can't access it only the new one forced on me

Dear @Anna Pateman, 

Thank you for posting your question in the Microsoft Q&A forum.  

Based on my understanding, is it correct that when signing in to Outlook on the laptop, Windows required using a passkey (a password sign-in method via Windows Hello)?  

• After setting up the passkey, Outlook on the laptop created new Window profile. 
• Therefore, the original email account and old Window profile no longer appears on the laptop, but email still works normally on the phone. 

Am I understanding this correctly? 

On that new Windows profile, please try downloading the Office app and signing in with your Outlook account. That profile is just a new Windows profile for the computer. 

Removing a credential from the Windows Credential Manager is actually very safe. It’s the equivalent of ‘forgetting a saved password.’ It simply forces the computer to ask you for the password again. It never deletes emails, contacts, or account data. 

About the passkey: This is a new Microsoft security feature. When signing in, choose Use another account or Sign-in options to use the correct original email. 

Also, could you please help me detail more about "your account is both Business and Education even though your account is private – your web provider made it so"? 

If there’s anything I may have misunderstood, I would truly appreciate it if you could provide a bit more detail to help me better understand your needs. 

Looking forward to your response! 

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