title: MS-CRM 2013 Prevent user to move on next stage
body: <p>I am working on Business Process Flow. I have created flow <strong>Contact--Opportunity--Quote--Order--Invoice</strong> as per the requirement. Entity <strong>Opportunity</strong> have attribute <strong>Budget Amount</strong>, If the budget amount is less than 300,000 user should not move to next stage. My question is how to prevent an user to move to next stage. I am writing plugin to do so.</p>