Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
What can be removed depends on what that old email is being used for:
- If it is a sign-in email/alias on a personal Microsoft account: go to Edit account info at
https://account.live.com/names/manage, then select Remove next to that address. If the old address is the primary alias, add another email first and make it primary before removing the old one. - If it is a security/verification email: go to the Security info page, add a new verification method first if needed, then choose Remove or Delete next to the old email.
Important points:
- Microsoft may require adding new security information before the old information can be removed.
- If access to the old verification methods is no longer available, choose I don't have any of these and follow the prompts to replace the security information.
- If an email address is deleted by mistake from security info, it must be added again.
- For Microsoft-domain aliases such as @outlook.com, @hotmail.com, or @live.com, removing the alias permanently deletes that address and it can’t be reclaimed.
If the issue is in classic Outlook for Windows and the goal is only to stop that account from appearing in Outlook, remove the account from Outlook:
- Open Outlook.
- Select File > Account Settings > Account Settings.
- Select the account.
- Select Remove.
Note: removing an account from Outlook does not deactivate the email account itself. It only removes it from Outlook on that computer.
If the old email is still listed under Windows account settings, it can also be removed from Settings > Accounts by selecting the account and choosing Remove Account.
If sign-in is blocked because no old verification method is accessible, use Microsoft account recovery flow and replace the security information first.
References:
- Change the email address for your Microsoft account
- Removing a sign-in verification method
- Set up an email address as your verification method | Microsoft Support
- Remove or delete an email account from classic Outlook for Windows | Microsoft Support
- How do I remove my email account? | Microsoft Support
- How to delete/update my backup/old email address? - Microsoft Q&A