Hello, after migrating to Exchange 2016 we have users that get the certificate name alert pop-up as attached below. For some reason our outlook users see the FQDN of the server, even though they connect to the alias on the cert. Outlook version = 15..4989.1000. Exchange 2016 CU5 (no dag, single server, 300 users). 12. · This happens only to my system and only after I removed that certificate, when I view it the 'General' tab shows: This certificate has been revoked by its certification authority. I am behind a corporate firewall and the system in question is within the firewall, however I am going through a VPN tunnel to get into the network from a. 2020. 3. 10. · Follow these quick tips when getting certificate errors on your iPhone, iPad, or iPod. Restart your device. Force close the app and launch it again. Update your device’s Date & Time settings to Set Automatically. For issues. Search: Outlook Turn Off Security Certificate Warning. When I start Outlook , I get an "Internet Security Warning" dialog box with the message; The server you are connected to is using a security certificate that cannot be verified The trial certificate allows for the customer to test the SSL installation and function of an SSL 0 is definitely.