Forum Discussion
Exchange 2019 Certificate Error
Hello! Neymar
The certificate name mismatch occurs because the newly added Exchange Server 2019 is being accessed directly by users' Outlook clients.
To resolve this issue, block inbound TCP port 443 traffic from client networks to the Exchange Server 2019 IP address at the firewall level.
This will prevent direct client connections to the backend server and ensure that Outlook connects only through the designated load balancer or Client Access endpoint.
Hello AnnTaeYoun
Thanks for your answer, but even by doing this, the pop up that says that the certificate is not correct still appears.
Hello AnnTaeYoun
Thanks for your answer, but if I do this, as soon as I migrate my users on Exchange 2019, what will happen? I will have the same error i guess
