

What does it mean to have a certificate in outlook? It says: 'The server you connected to is using a security certificate that cannot be verified. I'm getting a security warning when I open Outlook. This hard to understand error means the security certificate your email server is using has expired or is invalid for other reasons. Why do i get a security certificate warning when i open outlook?


Sometimes, ISPs change the names of their servers and this could cause this error. Frequently Asked Questions Why is my email certificate not verified in outlook?Ĭertificate Name Mismatch: A potential cause behind this error is having different certificate names in Outlook and your email server.
