A server apparatus that is capable of notifying a user of an execution situation of a print job input to an image forming apparatus from an external apparatus. The server apparatus notifies an application of a communication terminal of information about a print job executed by an image forming apparatus. The server apparatus includes an obtainment unit that obtains status information about a print job that is input to the image forming apparatus from an external apparatus, and a controller that displays a message based on the status information on a display unit of the communication terminal. The controller displays a message, which shows that a predetermined print job cannot be executed because another print job is under execution, in a case where the predetermined print job is input to the image forming apparatus and the image forming apparatus is executing the other print job.