I just renewed my Certificate for my private email server. The tiny icon next to the https shows the site is current and secure. However, my iPhone, iPad and Outlook all do not recognize the renewal. They are all throwing warnings. Outlook shows “Internet security warning” and shows the old expired cert. iPhone and iPad will not accept the cert which lead me a draconian solution. Delete and reinstall the emails.
I am stuck. There is no clear answer online. The certificate is valid and current. None of my end points recognize the change. I use LetsEncrypt with an AWS server using iRedMail. Also using Cloudflare CDN. And why is the cert period so short – 3 months.
How to solve.