See Exchange Server 2013 SSL certificates for more details on this as well as step by step instructions. To resolve the issue install a valid SSL certificate on the Exchange server from a trusted certificate authority. Outlook makes connections to the Exchange server over HTTPS and therefore must trust the SSL certificate that is configured on the server, otherwise it will display those error messages to the end user. This error occurs when the Exchange server is configured with a self-signed SSL certificate. Outlook India, more than just a news magazine online, offers todays news, latest news, top headlines, videos, photos and blogs on India, politics, world. Outlook is unable to connect to the proxy server (Error Code 8). Learn what Your connection is not private or Your connection is not secure errors mean, how to fix them, and how SSL certificates help prevent these. The security certificate is not from a trusted certifying authority. There is a problem with the proxy server’s security certificate. Error: Outlook is unable to connect to the proxy server If you choose Yes to proceed you may also encounter this additional error message. View the certificate to determine whether you want to trust the certifying authority.

The security certificate was issued by a company you have not chosen to trust. When connecting to an Exchange server using Outlook 2013 you may encounter an SSL trust error.

Outlook your connection is not private