Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
This usually means the old email is still configured on the account as either:
- the primary alias, or
- a security verification method.
What to check:
- Go to Your info and review the email addresses/aliases on the account. Verification codes sent by email can only go to your primary alias or to another email added as a way to verify sign-in.
- Go to Security > Manage how you sign in.
- Check whether the old email is listed there as a sign-in or verification method.
- If the old address is no longer valid, add a current email as a new way to verify sign-in, then remove or replace the old one if allowed.
- If prompted during sign-in and the listed email/phone is no longer accessible, select I don't have any of these and follow the prompts to replace the security info.
Important:
- If all previous security info is replaced, the account can be restricted for 30 days.
- Support agents cannot send verification codes or directly change account details.
- If the old email is only used for notifications in Azure DevOps, email changes can take up to 24 hours to propagate, but for Microsoft account verification the key settings are the alias and security info.
If the old address is shown but not recognized, also confirm the sign-in email/domain is correct and not a different Outlook/Hotmail/Live country-domain variation.
References:
- Change the email address for your Microsoft account | Microsoft Support
- Microsoft account security info & verification codes | Microsoft Support
- Troubleshoot Microsoft verification code issues | Microsoft Support
- Common problems with two-step verification for a work or school account
- Microsoft answers is using an old email address - cannot update it anywhere - Microsoft Q&A