There are situations where the sourceofauthority for a useraccount may need to be transferred from Office 365 to Active Directory if an account was originally created in Office365 prior to directory synchronization being enabled – for example, with pilot useraccounts. By transferring the sourceofauthority, the account can then be managed in the onpremises ActiveDirectory. Such a transfer is achieved in DirSync by using "SMTPmatching," where the primary SMTP address is used to match a newly-created onpremises user account to an existing Office365 user account.