accidentally have two accounts

The two accounts cannot be merged, but it is possible to stop using the locked account and move to the account that has the Microsoft 365 subscription.

Based on the available guidance, the closest supported approach is:

1. Decide which account to keep
   • Keep the Microsoft account that uses the Gmail address, because that is where the Microsoft 365 subscription is.
   • The Optonline-based Microsoft account will effectively be abandoned/closed once no longer needed.
2. Move data and services (where possible)
   • Sign in to OneDrive, Outlook, and other Microsoft 365 apps on Windows and Android with the Gmail-based Microsoft account.
   • Manually move or reconfigure any files, email, or app sign-ins that were previously associated with the Optonline-based account (if access is still possible). There is no automated migration between the two Microsoft accounts.
3. (Optional) Add the Optonline email as an alias to the Gmail-based Microsoft account
   • This step is only possible if the Optonline address is not already in use by another active Microsoft account.
   • If it becomes available, add it as an alias to the Gmail-based account so that both addresses can be used to sign in to the same Microsoft account.
4. Close the unwanted Microsoft account
   • After confirming that there is no important data or purchases on the Optonline-based account, close that Microsoft account.
   • Once closed, the email address can be reused as an alias on the Gmail-based account (if needed and available).

The key limitations are:

• Microsoft accounts cannot be merged.
• Purchases, subscriptions, and data tied to the Optonline-based Microsoft account cannot be transferred to the Gmail-based Microsoft account.

References:

• Which account do you want to use?
• I realize I have 2 different accounts. How do I combine the 2? - Microsoft Q&A
• Connecting a Microsoft subscription to Outlook