Knowledge Base

This guide provides the step-by-step process for uploading a custom SSL certificate to Cloudflare and ensuring it is properly bound to your domain. This enables Cloudflare to serve your certificate at the edge and ensures secure HTTPS connections.

This guide provides detailed instructions for installing SSL/TLS certificates in Microsoft Exchange 2019 to ensure secure communication between clients and the Exchange server. It covers the entire process, including importing Certificate Authority (CA) certificates using the Microsoft Management Console (MMC) and installing the server certificate through the Exchange Management Shell.

Learn how to achieve DMARC compliance for Verified Mark Certificates (VMC). This guide explains DMARC, its importance for email security, and step-by-step instructions for configuring SPF, DKIM, and DMARC records.

Learn why public SSL certificates cannot be issued for internal IP addresses or hostnames and explore secure alternatives like private CAs and Sectigo Private PKI solutions for internal systems.

Access New Sectigo Public Certificate Chain

WHOIS Email DCV Deprecation

This article explains the steps involved in exporting a PFX (Personal Information Exchange) file format with 3DES (Triple Data Encryption Standard) encryption.

This article explains the steps involved in exporting a PFX (Personal Information Exchange) file format with AES (Advanced Encryption Standard) encryption.

Understanding Certificate Transparency (CT) Logs and Precertificates

The Java error saying 'The security certificate was issued by a company that is not trusted' is due to the root certificate not being found in the java root certificate store. Below is the type of error that is seen. To resolve this issue update to the latest version of Java. Also see this article which identifies when our roots were first included in Java