Re: Office 365 Autodiscover - Certificate warning
☄ Helpfulby skorzen 2017/08/04 10:30:37
I also had this problem. I solved it by configuring the proxy settings in the browser of my clients, exempting *.onmicrosoft.com from being send to the proxy. Another solution is importing the Fortigate CA certificate in the certificate store of the clients. Another solution is disabling explicit proxy and exempting *.onmicrosoft.com from ssl inspection.