Resolved Outlook is generating an Internet Security Warning when CA Root Certificate is issues by and to Ples

[Craig1986]

I currently run a VPS, which hosts both my website and mailserver requirements; with my opted email client being Outlook.

Recently, I had to rebuild my VPS. As such, I have had to re-create my Email Accounts. Prior to the rebuild, I exported all the emails in Outlook where I have now successfully imported back into Outlook after the rebuild.

My issue now, is that when I open Outlook, I get an 'Internet Security Warning' message as per my attachment. Why would this be as such a warning message was not appearing prior to the rebuild.

I then selected 'View Certificate' where I can see that the certificate is both issued to and by Plesk. Is this normal and okay? I just don't recall this ever happening previously. I was under the impression that the certificate needed to be issued to the server.

 

[Ohya]

Yes this is normal, because this is a selfsignet cert, so, you have two ways, buy a certificate or install lets encrypt in hostname or last option, just accept it as valid in your outlook

This is well documented in plesk docs

 

[Craig1986]

Yes this is normal, because this is a selfsignet cert, so, you have two ways, buy a certificate or install lets encrypt in hostname or last option, just accept it as valid in your outlook

This is well documented in plesk docs

In my haste to rectify some User Interface issues, I completely overlooked the 'Let's Encrypt Certificate'. Thanks for the reminder. All resolved!