Normally, we recommend moving your domain to us. It is much easier to collect all domains and webspaces in the same place, creating less confusion regarding renewal and administration.
If you, however, still wish to keep your domain with another provider and never move it to us, while having a webspace with us - you can simply choose that you do not wish to move the domain when ordering via our website.
Hereby you are still the one responsible for renewal and administration of the domain.
If later on, you wish to move the domain to us, please contact our support.
Article from category Domain & DNS