In order to deactivate DNSSEC please follow these steps:
- Log in to your account.
- Go to DOMAIN NAMES > ACTIVE.
- Click on "Manage" on the right of the concerned domain.
- Click on MANAGE DNSSEC.
- Click on DEACTIVATE DNSSEC.
IMPORTANT: if you need to update a domain from name servers to external ones, it is absolutely necessary that you first deactivate DNSSEC, following the steps above.