Thank you for the reply.

I am using Microsoft Office Outlook 2003 SP1, all of the client OSs are
either Win 2000 Pro SP4 or WinXP Pro SP2. All of the Office suites are
MS Office 97, 2000 and 2003. I need to install Outlook 2003 to each and
every client computer through network(no problem right?). User that is
created by Windows Server 2003 requires administrator status in order
to start Outlook 2003, even other programs like Word, Power Point and
Excel cannot be opened.

Hope for a reply. THank you!