This can be achieved by making the VPN interface as the default gateway for all the packets that exit the company.
Specify a Connection Name to which remote users connect. From the SSL VPN Interface drop-down list, choose the interface to which remote users connect. When users establish a connection to this interface, the SSL VPN portal page is displayed.
From the Certificate drop-down list, choose the certificate the ASA sends to the remote user to authenticate the ASA.