Yes, to add a mailbox as a secondary mailbox, you need Full Control access to the mailbox, set it in ADU&C, or at least Folder Visible permission, set in Outlook, on all folders including the mailbox root.

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx

wrote in message ups.com...
I would like to add another exchange mailbox. I created the exchange
mailbox successfully. Are there any permissions to set on the server?

I used Tools-Email-Accounts to create a second mailbox. I could
confirm that the new mailbox was created. However, when I try to expand
the icon to see the folders, it throws me an error "unable to expand
the folder." The second mailbox was supposed to be from a different
domain. The primary mailbox is still operational. How do I set up
outlook to receive email into the second mail box?

Thanks for your help