When you inactivate a task, the software formats the task with gray font and uses the strikethrough font effect, hollows out the Gantt bar, treats the task as if it has 0 hours of remaining work, no longer reflects resource availability, and cancels the dependency relationship.

Only Project Professional allows you to inactivate tasks.

This is helpful if you know the role that is needed to complete the task, but you have not yet been assigned a specific resource. Only Project Professional contains a Generic Resource checkbox to indicate that a Work resource is generic. Project Server is useful in portfolio management and team collaboration tools. The ability to connect to Project Server is only available if you have Project Professional. If you have Project Standard, the Resource Sheet is the default view. The Team Planner is the default view under the Resource tab if you have Project Professional. The Team Planner allows you to assign tasks that have not yet been assigned as well as move tasks between resources, such as in the case of overallocation. The Team Planner is only available if you have the Professional version of Microsoft Project 2013. Trying to figure out whether to get the Standard or Professional version of Microsoft Project 2013? I have listed the following feature differences below, that will hopefully help you make a better decision.

Ms project pro 2013