  We investigate sums of exceptional units in a quaternion ring $H(R)$ over a
finite commutative ring $R$. We prove that in order to find the number of
representations of an element in $H(R)$ as a sum of $k$ exceptional units for
some integer $k \geq 2$, we can limit ourselves to studying the quaternion
rings over local rings. For a local ring $R$ of even order, we find the number
of representations of an element of $H(R)$ as a sum of $k$ exceptional units
for any integer $k \geq 2$. For a local ring $R$ of odd order, we find either
the number or the bounds for the number of representations of an element of
$H(R)$ as a sum of $2$ exceptional units.
