Security Certificate Was Issued By A Company You Have Not Chosen To Trust - Outlook The

If you manage Microsoft Outlook in a corporate environment, or even just use it for business email, you have likely stared at that dreaded pop-up:

Your company uses Microsoft Exchange Server on-premise. The server presents a self-signed certificate or one issued by your internal Microsoft PKI (Certificate Services). Your personal computer doesn't know your company's internal CA. Outlook sees "Issued by: Contoso-Internal-CA" and thinks, "I don't know Contoso. I never agreed to trust them." If you manage Microsoft Outlook in a corporate

Stay secure. Stay skeptical. And for the love of all that is holy, stop using self-signed certificates for production Exchange servers. If you manage Microsoft Outlook in a corporate