Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Sign in to the first Microsoft account. Check your email in Outlook, check the contents of your OneDrive, check your saved passwords in Microsoft Edge, check your subscriptions, and anything else in your Microsoft account that you want to check.
Now sign in to the second Microsoft account and do the same thing.
Decide which Microsoft account you want to keep, and which one you want to delete.
Before you delete one of your accounts, be sure to move whatever you have in that account that you want to keep to the other Microsoft account.