Dynamics 365 database consists of data about the organization and its various departments. When it comes to the data, its the very important piece of the business and it can be misused in many ways, if it reaches the wrong hands. We don’t need any other fancy reason to make sure that the data is accessible by only those who are supposed to be. Dynamics 365 comes up with a security model which is flexible enough to meet most of real life scenarios in today’s business world. One of the major part of that puzzle is the hierarchy security to control access within the system. In this blog we will discuss about the manager and position hierarchy security model, how to set them up and some performance considerations regarding the same.