VUDU Set-top Boxes (VBX100, VBX1000): Go to www.vudu.com and login to your existing account. Then click on the ‘Activate’ option in the top right-hand corner of the web page. Enter the activation code you received from your new VUDU.
VUDU Enabled Devices: Activation instructions for VUDU enabled devices can be found here. Once you have clicked on the link in the activation email, you will be presented with an activation screen that allows you to either ‘Create New Account’ or ‘Login to Existing Account’ – you will want to ‘Login to Existing Account’ to activate your new VUDU enabled device onto your existing VUDU account.