Your Exchange admin can set Send As permissions on the mailbox instead of
Send On Behalf Of permissions.
I've got no clue what you are asking in your second question. If you're
asking how permissions work in Outlook see;
http://www.howto-outlook.com/howto/permissions.htm

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Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
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> In our office we have a customer services email which is reviewed by the
> executive officer only. She then redirects all of the emails to the
[quoted text clipped - 11 lines]
>
> Thanks