What happens when we run new mailbox creation wizard in Exchange 2003


This adds below attributes :-
HomeMDB : home location of mailbox in database
Homemta : native mta
Legacyexchangedn : used for compatibility with exchange 5.5
Mail : primary email address
Mailnickname : maillbox alias
Msexchhomeserver : the server which your mailbox is located
Msexchmailboxguid : guid for primary sam account of mailbox
Msexchmailboxsecuritydescriptor : defines mailbox rights
Proxyaddresses - additional address

Also this set permission to Self only, that’s why mailbox is created only after sending mail to that user Or when user log in.