In Annex I of the UEFA European Under-21 regulations, article 3 b) says:
In the case of an association that hosted a UEFA European Under-21 Championship final tournament during one of the last two full cycles and therefore has no points from the respective qualifying competition, the points earned in the qualifying competition of the 2009-11 UEFA European Under-21 Championship are used.
In my opinion, this is wrong.
Denmark hosted the 2009-11 final tournament, thus it can't use the points from 2009-11 qualifiers. Maybe it should use the points from the 2011-13 qualifiers.