How to Rename a User (Including Email Addresses)

To rename a user account (including email addresses), do the following:

  • Right-click the user account and select Rename from the context menu.
  • Rename all relevant name attributes and click OK.
  • Open user properties and select the Mailbox tab.
  • Rename the Alias and click Apply.
  • Select the Office 365 tab and click Proxy Addresses.
  • Click Create from domains and configure the new primary SMTP address.
  • Click OK, select Synchronize AD with Office 365, and click OK.