I had this "Enterprise sets the deadlines" experience just yesterday. I delivered a spreadsheet with detailed information of how long it would take to develop

I had this "Enterprise sets the deadlines" experience just yesterday. I delivered a spreadsheet with detailed information of how long it would take to develop each feature of the new module they wanted. It totalled around 3 months of development. Fancy suit folks told me 3 months wouldn't do because sales promised it would be ready in 2 months. Then I was asked where could shortcuts be taken. In the end we had to cut features that will certainly upset our client given their initial expectation.