hi i have exchange server 2007 SP1 i needed to give delegation for a user to be able to create mail box's . when i open my exchange server and go to Organization configration i can't see the delegation option !! is it the SP1 and what is the add value for installing SP2 ? thank you

If you click on organization configuration - on the action page, you will have add administrator option. click and selecte recipient administrator role for that user

Here's a list of standard roles with Exch 2010 and what they do. - http://technet.microsoft.com/en-us/library/dd638105.aspx#Builtin Administrators who are members of the Recipient Management role group have administrative access to create or modify Exchange 2010 recipients within the Exchange 2010 organization. Sukh

Exchange 2007 has only four different administrator roles that you can choose. 1. Exchange Organization Administrators 2. Exchange Recipient Administrators 3. Exchange Server Administrators 4. Exchange View-Only Administrators In order to create mailbox, you need to add the user into Exchange Recipient administrators. You could follow this article to add a user or a group in the role. How to Add a User or Group to an Administrator Role