We plan to move our mailboxs in our Exchange organisations to one Exchange Resource forest (one-way trust). Is it possible to create an linked mailbox (login user , disabled user and mailbox) by one admin account? I want to grant the administrator in the user domain the rights to manage exchange in the resource forest, but don't know how.

Hello Albert, Kindly check these articles and i am sure it will help you. http://technet.microsoft.com/en-us/library/dd298099.aspx http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/deploying-exchange-resource-forest-part1.htmlGulab | MCITP: Exchange 2010-2007 | Lync Server 2010 | Windows Server 2008 | Skype: Exchange.Ranger | Blog: www.ExchangeRanger.Blogspot.com