Exchange 2003 - Send As Permission

I have a mailbox that 2 additional users want to monitor and send out E.mails as that user.

I have went to the mailbox properties for the monitored mailbox - Exchange Advanced - Mailbox Rights

Gave the 2 users Full Access along with myself.  for the other 2 users they get the 'You do not have permission to send on behalf of'

But I do.

The process is that in the From field - I enter the name of the mailbox that I want to send as and the recipient in the To box.  Click send.  then I get the Send On Behalf Of error.

I am curious why it works for me and not for the other 2 users.

Now - if I give the user delegate access for Send on Behalf of - then it works 0 but the user does not want the recipient to see from User Sent on Behalf of Message in the body of the e.mail

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James MontgomeryCommented:
Try following this article from the exchange team themselves. You sould like you want "send as" permission which is hidden out of view normally.
The best way, is to give them full acees, which is done already and then configure one additional profile in their outlook for the shared mailbox. So they can send withuout the need for the send as and no need to sent on behalf field.

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