There are different ways to configure email forwarding in Exchange 2013. In Exchange 2013 you can use EAC (Exchange Administration Center) or EMS (Exchange Management Shell) to configure email forwarding. You can also use email client like Office Outlook and Outlook Web Access (OWA) to forward emails. Here, I will show steps to configure email forwarding using Exchange 2013 Outlook Web Access console.
Configure Email Forwarding in Exchange 2013 Outlook Web Access
Log in to the OWA console. Open settings of the mailbox by selecting the settings icon on top-right corner of the OWA page as shown below.
This will open up settings page. Click Organize email on the features pane. Then click inbox rules tab. Click down arrow and click create new rule for arriving messages option.
New page will pop which will let you configure inbox rule. Enter name of the rule. For option, when the message arrives and, choose [Apply to all messages]. Similarly, for option, do the following, choose forward the message to option.
Now click select people option. New window will open as shown bellow. Type the email address where you want the mails to be forwarded. Click OK. Click more to add exception rule.
You can now view the rule in inbox rule tab.
In this way you can configure email forwarding in Exchange 2013 OWA.