7 March, 2023 16:10

https://yusufustundag.com/how-to-fix-exchange-server-eventid-15021-httpevent/#:~:text=If%20you%20get%20Event%3A%2015021%2C%20HttpEvent%20error%20in,Check%20you%20https%20protocol%20%E2%80%9CExchange%20Back%20End%E2%80%9D%20Binding