Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
A Microsoft 365 Family or Personal account cannot be converted directly into a Microsoft 365 business account.
If the goal is to use business features, the supported path is:
- Create or use a Microsoft 365 business account.
- If the same email address is being used for both a personal Microsoft account and a work or school account, that can cause sign-in conflicts such as “Which account do you want to use?”
- In that case, rename the personal Microsoft account by adding a new alias and making it the primary alias. This keeps the personal account, but frees the business email address for work sign-in.
- For a personal Microsoft account, manage aliases in Your info at
https://account.live.com/names/manage. - If the business email address no longer works because it is part of a work or school account, and self-service changes are blocked, the Microsoft 365 administrator or internal IT support must update it.
If the business account needs to use a custom domain email address, that change is done in Microsoft 365 by an admin:
- In the Microsoft 365 admin center, go to Settings > Domains and add or verify the domain.
- Then go to Users > Active users and update the user name to the new domain.
- This requires a Global admin role.
Important: changing a domain’s MX record moves mail for that domain to Microsoft 365. Make sure mailboxes are created first to avoid mail disruption.