POP3 is just another way of accessing an Exchange mailbox, so providing you turn on the POP3 service from within ESM you can access the mailbox via POP3 with the AD credentials.
To the second question, set up two POP3 accounts in Outlook. Also make sure your sales and personal mailboxes are seperate accounts and not just aliases within AD. Exchange has a habit of replacing the name and from address with the account defaults as it hits the MTA.
█ Dan Kitchen | Technical Director | Razorblue
█ ddi: (+44) (0)1748 900 680 | e: [email protected]
█ UK Intensive Managed Hosting, Clusters and Colocation.
█ HP Servers, Cisco/Juniper Powered BGP Network (AS15692).