Analysis of Citrix Receiver Artifacts

Does anyone know if there is a way to view the history of how Citrix Receiver was used on a collected machine? Along with any other Citrix product that allows for remote access like GoToMeeting, GoToAssist, GoToTraining etc.? I am hoping to find a whitepaper of someone that has already done the research. I collected my client's personal machine. They are curious if their prior employer remotely accessed their machine without them knowing. Many Thanks!