Duas contas: empresa e familiar

Merging or combining two Microsoft accounts (for example, one corporate/enterprise account and one personal/family account) is not supported.

The only supported approach is to choose which account to keep as the primary one and then, if desired, add the email address of the other account as an alias on the primary account. This allows signing in with either email address, but:

• Purchases, subscriptions (such as Microsoft 365), licenses, and data (email, OneDrive files, etc.) from one account cannot be transferred or merged into the other.
• Anything stored or purchased under the account that is being closed will remain tied to that account and will be lost for future use once the account is closed.

To approximate a “single account” setup without losing data:

1. Decide which account will remain the main account (for example, the one that already has the Microsoft 365 subscription).
2. Ensure that any important data (files, emails, contacts) from the other account is manually backed up or copied (for example, download files from OneDrive, export mail, etc.).
3. Optionally, close the secondary Microsoft account and then add its email address as an alias to the main account, understanding that purchases and historical data from the closed account cannot be merged.

References:

• I realize I have 2 different accounts. How do I combine the 2? - Microsoft Q&A