Access to your Exchange account when you are outside of your organization’s firewall, such as when you are at home or traveling, usually requires a virtual private network (VPN). VPN connections provide remote access and connections to private networks over...
There are some situations where you may want to change how and when email accounts in outlook send and recieve emails.
Generally, it is because you have added multiple email addresses linked to one mailbox, and you want to avoid downloading duplicate emails.
You may wish to add an additional Email address or Email account to Outlook if you want to be able to send and recieve emails using a different Email address.