How to Create an Alias in Outlook

How to Create an Alias in Outlook

Note: You must be a Firm Admin to create an alias.  

  1. In the admin center, go to the Users > Active users page.
  2. On the Active Users page, select the user > Manage email aliases. (This option will not appear if the person doesn't have a license assigned to them.)
  3. Select + Add an alias and enter a new alias for the user. (For example, The email alias must end with a domain from the drop-down list.
  4. Click Save changes.

  5. Allow 24 hours for the new aliases to populate throughout Office 365. The user will now have a primary address and an alias. For example, all mail sent to John Smith's primary address,, and his alias,, will go to John's Inbox.

Note: If you get an error message "A parameter cannot be found that matches parameter name 'EmailAddresses' it means that it's taking a bit longer to finish setting up your alias, or your custom domain if you recently added one. The setup process can take up to 4 hours to complete. Wait a while so the setup process has time to finish, and then try again. If the problem persists, contact Microsoft Support and they will perform a sync for you. 

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