Hi,
OK, there is one other option for you to set the Outlook to choose network adapter of your choice
1. Click the Tools menu, and then click E-mail Accounts.
2. Click View or change existing e-mail accounts, and then click Next.
3. Double-click the default e-mail account, and then click More Settings.
4. On the Connection tab, choose your desired adapter to send e-mail from.
Regards,
Faraz H. Khan