I manage a team of about 15 employees. Whenever they take personal leave during normal working hours (8 am to 5 pm) I always ask why they are taking time off. Usually it is just for a doctor's appointment or a family thing.
Today, one of my employees indicated that it actually is not generally my business what they are doing on personal time off. But I feel it actually is my duty to the company to make sure PTO is not being abused as just free time away from work during normal work hours.
How can I emphasize to my employees that it is in fact "my businesses" as to why they are taking time off?