Trending @Accenture; No probation on offer letter

Hi folks, I can't see probation period on offer letter. I am not sure if I resign I have to serve 90 days or I can be free within a month? Where to check probation period if not mentioned in offer letter. I am stuck in support project where no learning is there and they are not even releasing me from project so I don't want to waste my time more here. I have joined in August this year. Please advise where to check for probation period