Automatically configure profile based on Active Directory Primary SMTP address once
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 accounts in Outlook.
If this policy setting is enabled, users can create a new profile by entering a profile name. The profile is created without using the New Account wizard. No user interface appears as the profile is created.
This key will be ignored after the first profile has been successfully created.