I need to configure Outlook to use 2 e-mail address, I can easily add a secondary address to Exchange Mailbox and receive e-mail from it but I'm not able to send e-mail from non primary SMTP Address. How can I fix it ??
It's very easy: in Outlook, add a POP3 account for the previous user, modify the Send/Receive Settings and from the All Account Properties deselect the Receive Mail Items checkbox.
Now, when on the domain (or connected via VPN), there are two accounts in Outlook, one for each primary address, and Outlook will auto-select the account for replies, and auto-select the correct signatures, as Outlook does when using only POP3 accounts