How to set up duplicate email management for your website.

Enable the feature.

1. Go to Setup > Company > Enable Features.
2. On the Web Presence subtab, check the box next to Web Site Duplicate Email Management.
3. Agree to the terms of service.
4. Click Save.

After you enable website duplicate email detection, shoppers cannot sign up for a customer account with an email address that belongs to an existing customer. If a duplicate email address is detected, the shopper can either register with a new email address or reset the password for their customer account. In OneWorld accounts, shoppers are not allowed to register with an email address that is already assigned to an existing customer in the same subsidiary.