  We construct a non-commutative Aleksandrov-Clark measure for any element in
the operator-valued free Schur class, the closed unit ball of the free Toeplitz
algebra of vector-valued full Fock space over $\mathbb{C} ^d$. Here, the free
(analytic) Toeplitz algebra is the unital weak operator topology (WOT)-closed
algebra generated by the component operators of the free shift, the row
isometry of left creation operators. This defines a bijection between the free
operator-valued Schur class and completely positive maps (non-commutative AC
measures) on the operator system of the free disk algebra, the norm-closed
algebra generated by the free shift. Identifying Drury-Arveson space with
symmetric Fock space, we determine the relationship between the non-commutative
AC measures for elements of the operator-valued commutative Schur class (the
closed unit ball of the WOT-closed Toeplitz algebra generated by the Arveson
shift) and the AC measures of their free liftings to the free Schur class.
