Why, despite MS Authenticator working on my two MS accounts on the same phone, can I not merge them?

[Mike Garrard]

I don't buy this 'security' argument as my 2-step Biometric is the same device. I have a bought subscription O365 on a gmail and a replacement laptop on an outlook address. To get to my bought OneDrive space I must logon to my laptop using outlook then gmail to OneDrive, and the effect seems to be that autosave can have a frothy over accounts and blank my file!Despite MS, when I logon to my laptop, I get O365: so they know the accounts are linked.Authenticator knows the accounts are linked.Windows knows the accounts are linked: 'sign in with a different account'.Aliases doesn't work because

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