How to Use Outlook to Give a User the Ability to Send Mail on Your Behalf
To grant a user the ability to send mail on your behalf, perform the following procedure.
Procedure
To use Outlook to give a user the ability to send mail on your behalf
In Outlook, on the Tools menu, click Options, and then click the Delegates tab.
To grant permissions to a new user or group, click Add.
Outlook provides the Address Book, from which you can select users.
Click a user, and then click OK.
Outlook provides a Delegate Permissions dialog box for the selected user. See the following figure.
Delegate Permissions dialog box
In the Delegate Permissions dialog box, grant the selected user access to the appropriate folders. By default, the user is granted Editor permissions on the Calendar folder.
The roles you can assign here are the same as the roles you can assign using an individual folder's Permissions dialog box.
For More Information
For more information, see Understanding Exchange Server 2003 Mailbox Access Delegation, Granting Users Full Access to a Mailbox Other Than Their Own, and "Managing Mailbox Stores and Public Folder Stores" in the Exchange Server 2003 Administration Guide.