Recently Microsoft activated an automatic status update which is sent to students and staff. According to the company new Microsoft 365 experiences, such as the Briefing email and Play My Emails, were enabled using Cortana enterprise services. These features are currently available for Stellenbosch University staff and students.
However, you can unsubscribe from these emails by clicking unsubscribe at the bottom of the email or unsubscribe at https://cortana.office.com/