How to remove.a Closed email account as the verification for login and replace with another email

Yes—add the new verification method first, then remove the closed one.

For a personal Microsoft account:

1. Go to the Microsoft account Security page and sign in.
2. Select Manage how I sign in.
3. Select Add a new way to sign in or verify.
4. Add the new method you can access, such as a recovery email, Microsoft Authenticator, or a passkey.
5. Enter the security code sent to that new method, then select Next.
6. After the new method appears in the list, go to Advanced security options.
7. Expand the old verification method and select Remove, then select Remove again to confirm.

Important:

• Microsoft recommends not removing old security info unless there is a security risk.
• If replacing security info, add the new information first.
• If all security information is removed, the account enters a restricted state for 30 days. During that period, no further changes or additions to security settings or billing information can be made.
• Verification codes sent by email can only go to the primary alias or another email already added as a sign-in verification method.

If the closed email is the only verification method and access to any existing method is no longer possible, use the sign-in flow and choose the option such as I don't have any of these to replace the security information. Replacing all previous security info triggers the 30-day restricted period.

• Microsoft account security info & verification codes
• Removing a sign-in verification method
• Change the email address for your Microsoft account
• Please confirm my e mail address as <removed PII>@outlook.com - Microsoft Q&A