Dear sir,My system is windows 2008 and exchange 2007At this moment, I could create user and mailbox in Exchange 2007Could I create mailbox in AD directly with some plug-in, like in windows 2003 with exchange 2003?

Exchange Management Console or Exchange Management Shell are your two options of creating mailboxes in Exchange 2007. Exchange Management Shell is very powerful tool so I would get well versed with it if you are an Exchange Admin.http://www.msexchange.org/tutorials/Managing-mailboxes-Exchange-Server-2007-Part1.htmlMVP Exchange Server

Yes, As John said, the best way is Exchange Managment Shell or Console to manage Exchange 2007 recipient... But there are some third-party utility is also available like U-B Tech Exchange Tasks which is a plug-in works with ADU&C to manage Exchange 2007 recipients like we used to do in Exchange 2003... Managing Exchange 2007 Recipients using the Active Directory Users and Computers MMC Snap-in http://www.msexchange.org/articles_tutorials/exchange-server-2007/management-administration/managing-exchange-2007-recipients-active-directory-users-computers-mmc-snap-in.htmlAmit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com