I am using the Outlook 2016 desktop app bundled with Office 2016 Professional Plus.
I have just set up outlook and am finding that everytime I launch it asks me to confirm a security certificate.
I have 'installed' the cert several times, but I am still asked each time I load Outlook. I have installed it as 'current user'.
I know the image says the Principal name is incorrect, I have checked this with my webhost and they have confirmed there is nothing wrong with the cert.