I'm running Exchange 2010. We are looking for the best way to setup a shared mailbox. We have two users that we want to have access to one customer service mailbox. The users are not part of the domain, but we have been utilizing Exchange Outlook Anywhere. We want the users to have the ability to know if someone read/responded to an email or to have some ability to mark that the user has read the email. What is the best way to accomplish this?