When companies select staff, they would not dream of thrusting them into the outside world without being fully trained in the companies products and corporate brand values. In any team you will find a complete mix of people with very different levels of credibility, just because of the way that they represent themselves. Very few people have an in-built instinct for making the most of their appearance especially in the corporate world. Sometimes how they put their choice of garments together can completely undermine their credibility. Perhaps you have staff who you wish to promote but you cannot because their image does not reflect your corporate brand.