Expert articles typically involve offering your views or opinions or commentary.
Your organization may also have offered a considered and official view after due internal diliberation or made a public statement in relation to the same topic.
Your personal opinion may conflict with such a view and your employer may seek to deliberate this with you or may wish to ask you to add disclaimers to the effect that these are your personal opinions only to prevent any perception of conflict. Accordingly, the prior approval you received may include disclaimers to be added for this purpose.