With business casual and fashion being more integrated with professional dress, things have changed. in the past, the most conservative look for women was a suit with a skirt. For conservative industries this still hold true but most organizations today are not considered “conservative”.
In this case, women can opt for a pant suit instead. But be sure to keep it on the conservative side such as a dresser shoe; this mean NO flats! A heel is a must. Combine it with a blouse that is made a more dressier fabric such as silk. A simple cotton Tee is not conservative.
Wear substantial accessories. Not over the top but something that has some weight and substance.
Changing with the times can be fun or frustrating. A good rule of thumb? When in doubt, do without!