Flag to assign the project to all employees. Projects assigned to all employees can't have members. If set to true, every employee in the company is able to track time against this project. If set to false, only members of the project can track time against this project.
When this field is updated from false to true, all the project's existing members are removed.
Sub projects (projects with a parent project) always have the same assigment as their parent project. This field shouldn't be provided for sub projects.