How to Fix an Office 365 Alias That Is Not Receiving Email
Question details
The user has created an Office 365 alias that can send emails but fails to receive incoming messages.
- Product
- Office 365
- Device & OS
- not provided
- Scenario
- Configuring an email alias for receiving messages on an existing Office 365 Exchange Online account.
- Observed behavior
- Emails sent to the newly created alias address do not arrive in the primary inbox, despite outgoing emails functioning properly.
Ensure you have Microsoft 365 global admin or Exchange admin privileges, as verifying domain settings and modifying proxy aliases requires administrative access.
Verify Exchange Alias and Domain Settings
Ensure the alias is correctly added as a proxy address in the Exchange admin center and the domain is fully verified.
If the domain is unverified or the alias is not configured as a proxy address for the correct Exchange Online mailbox, incoming emails will fail to route properly.
Log into the Microsoft 365 admin center using your admin credentials and navigate to 'Users' > 'Active users'.
Select the user account experiencing the issue. Under the 'Account' tab, click on 'Manage username and email'.
Confirm that the alias is listed accurately and associated with a fully verified domain. Make sure it is added as an Exchange alias rather than a personal Microsoft account alias.
Save any changes. Keep in mind that directory synchronization and DNS propagation can take a little while to update across all servers.
Run a Message Trace and Check Filters
Use the Microsoft 365 message trace tool to determine where the incoming emails to the alias are being blocked or redirected.
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Frequently Asked Questions
How long does it take for a new Office 365 alias to start receiving emails?
It can take anywhere from a few minutes up to 24 hours for a newly created alias to sync across Microsoft's Exchange servers globally. If it doesn't work immediately, wait a few hours and test again.
Why are emails sent to my alias going directly to the junk folder?
Incoming emails to an alias can be flagged by your organization's spam filters, unverified sender domains, or individual inbox rules. Checking the message trace in the Exchange admin center and adjusting anti-spam policies can help resolve this.
Can I log into Office 365 using my email alias?
By default, you cannot sign in using an email alias. You must log in using your primary User Principal Name (UPN) and password, although you can configure Outlook to display the alias as the 'From' address when sending emails.
