Trending @Accenture; Notice period negotiation

I got placed in a product company. But my notice period in accenture is 90 days. The new company wanted me to join in 30 days. Is there any way to shorten the notice period or any buyout option available in Accenture. Incase of any emergency will they give early release and what sort of emergency reasons that could be? Did anyone from Accenture went through this and how did you handled it. Please share your experience.