shared email account problems

[Ronaldo]

We have a shared outlook email account accessed by 8 users. When two users try to move or read an item from the shared account at the same time they can do this. Thus, they both work on the same email and dulicate this work.

I need to be-able to lock the email or mark it unread as soon as the initial user opens or moves it, for example, if two users try to move the email into thier personal email account the email will only move for the user that moved/opened the item first.