Issue The target principal name is incorrect

[andrecab93]

Server operating system version

Ubuntu 22.04.4 LTS

Plesk version and microupdate number

Version 18.0.60 Update #1

Hello,

I'm getting this error in outlook. I've followed the steps in this link: https://support.plesk.com/hc/en-us/...hen-connecting-account-hosted-on-Plesk-server



This has only been happening for about a month now

It still doesn't work.

Any other ideas?

Thank you

 

[Kaspar@Plesk]

Whats the message when you click "View Certificate"? And which certificate is selected on Tools & Settings > SSL/TLS Certificates > Certificate for securing mail?

 

[andrecab93]

 

[andrecab93]

 

[andrecab93]

 

[Bitpalast]

The incoming and outgoing mail server name in MS Outlook need to match the mail server name of your server (normally the host name).

 

[Kaspar@Plesk]

With the current information it's hard to say what's causing the issue. But @Bitpalast suggestion is right. The host used in Outlook for incoming and outgoing mail server should match the host name of the server.