Outlook mailbox name not updating
Double-click the mailbox entry for the user with which you want to work.3.On the General tab, the first text box sets the mailbox name.
Instead, these remain as alternatives to the defaults.To change the Exchange alias and mailbox name on a user account:1.In Exchange Management Console, expand the Recipient Configuration node and then select the related Mailbox node.2.The nickname list is generated automatically as you use Outlook.
The alias also sets the primary SMTP address associated with the account.
Whenever you change the Exchange alias, a new e-mail address can be generated and set as the default address for SMTP.