Several specified functions within the ABC Systems Software system cannot be fully accessed by those users to whom the applicable permissions have not been assigned.
My knee-jerk rewrite:
Not all users can access all functions in ABC Systems Software.
It may get tweaked a bit more, but geez ... passive voice really sucks sometimes.
I know this is a lame blog entry, but I just wanted to let you, my faithful (if imagined) reading public, know what I'm doing instead of blogging.
Pity the poor cubicle dweller.