not sure this is the right forum. I installed Let’s Encrypt in a LAMP server. After install, Outlook app 365 for Windows 10 keeps asking me to install the Let’s Encrypt cert every time it starts. Outlook warning runs: “The target principal name is incorrect” and “The server is using a certificate that cannot be verified”. See screenshot from Outlook warning here https://diigo.com/0e6mtj
If I click “yes” to use Let’s Encrypt, it will work without issue. But when I restart Outlook, it will request me to install Let’s Encrypt cert again. Any advice to solve this issue is welcome.