Building, integrating, or customizing apps and workflows within Microsoft Teams using developer tools and APIs
Hello
Thank you for reaching out to the Microsoft Community. My name is Eunice and I am happy to assist you today.
Please know you cannot merge two Microsoft accounts.
I pulled this information from Microsoft article link attached:
https://support.microsoft.com/office/06b122ca-7323-48f5-8cd7-c3408bcc2123
"For security reasons, it’s not possible to merge or combine Microsoft accounts, nor can you transfer such things as your game progress or gamertag, account purchases and balance from one account to another."
Let me know if you need more help.
Kind regards Eunice