"To get the best out of the performance of every employee, you need to make sure the system is working for everyone," Sheryl Sandberg, cofounder of Lean In said.

Experts say companies are rolling back their commitments to women's career advancement, which is leading to an ambition gap.

"To get the best out of the performance of every employee, you need to make sure the system is working for everyone," Sheryl Sandberg, cofounder of Lean In said.

“This is my fourth decade in the workplace, and we are in a particularly troubling moment in terms of the rhetoric on women,” Sandberg said.

A new Lean In study shows women don't want to be promoted. But others say women are redirecting their ambition.