Exchange shared mailbox settings

The easiest way to do this is to setup the mailbox in Outlook as an additional ACCOUNT.
This is instead of as an additional mailbox.

Go through the New Account wizard, enter the email address of the shared mailbox ONLY, no username/password required. Autodiscover will do the rest.

This also gives you full access to the mailbox - so rules, signatures etc.

Hello Simon, thanks for the comment. This will allow all email to remain in the email box and not be moved into the user who is access the shared mailbox?

All email stays in the original mailbox it was delivered to, unless a user moves it (you cannot stop that).

I do not think I am providing all information, or we have a strange setup in our environment. Let me provide more details in the hope you can help me. We currently have a user mailbox setup say we call it "dispatch". This will be a new mail user in exchange. Bob smith wants to view email from dispatch, IT provides full access permissions to dispatch mailbox for Bob. Bob reads email and deletes it, that email currently goes into Bob Smith's deleted items. What my goal is( or what I hope to achieve) , is to get that email to stay in dispatch's deleted items even if Bob deletes it. Is this possible?