Mac Leopard 10.5.3 Entourage 12.1
Exchange Server 2007
Can view some Colleagues Calendars after invite to share their Calendar.
Other Colleagues after putting all the details in. Entourage gave a message "Entourage could not find user' USER ' mailbox.
Yet when selecting the details it supplied the e-mail address.
Unfortunately the Exchange server is on a remote site.