Forwarding is when you send an email to an email address and it gets automatically forwarded onto another email address.
Enabling Forwarding on a Mailbox
Log in to the Control Panel using your Administrator Username and Password.
Select the Display Name of the mailbox you wish to add forwarding to.
On the next screen select Forwarding.
Select Enable object.
Enter the email address you want to forward the emails to and then select Submit. There is an option to leave copy of messages. By selecting this a copy of all the emails forwarded will be left in the original mailbox.
The next screen will show you that the forwarding has been successfully setup. You can choose to cancel the forward by selecting Disable Object or Change to edit it.
Forwarding to Multiple Mailboxes
You cannot use this setting to forward a mailbox to multiple email address. If this is needed it would require creating a Distribution List and setting the account to forward to the Distribution List address.