Automatically configure only the first profile based on Active Directory primary SMTP address
This policy setting controls whether users who are joined to a domain in an Active Directory environment can change the primary SMTP address that is used when they set up an account in Outlook.
If this policy setting is enabled, users can enter a profile name to create a new profile without using the new account wizard. A user interface does not appear as the profile is created.
This key will be ignored after the first profile has been successfully created.