Knowledge Base

Learn how to change certificate trust settings in Keychain Access on macOS. This step-by-step guide helps IT admins and advanced users manage trust preferences to resolve secure connection issues safely.

Learn how to securely sign PDF documents in Bluebeam Revu with a step-by-step guide. Includes prerequisites, digital ID setup, signature field creation, and authentication for compliance and document integrity.

Learn how to securely sign Microsoft Word documents using a digital signature and a document signing certificate. This step-by-step guide ensures authenticity, accountability, and integrity for official or sensitive files.

Learn how to request a Verified Mark Certificate (VMC) easily with this step-by-step guide. Discover the ordering process, account setup, domain validation, trademark and logo requirements, and best practices to ensure smooth certificate issuance.

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 how to resolve SSL/TLS certificate errors caused by incomplete chains. Understand why intermediate certificates matter, how to verify your chain, and best practices for secure configurations.

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.

Learn the step-by-step process to add a digital signature to a PDF using Adobe Acrobat Reader DC. Includes instructions for selecting your certificate and signing securely.

Learn how to securely configure Microsoft Exchange Server by generating a Certificate Signing Request (CSR), installing an SSL certificate via the Exchange Admin Center (EAC), assigning services, verifying installation, and importing intermediate certificates. This step-by-step guide ensures encrypted communication and proper certificate deployment for your exchange server.

Discover how to add a cross-sign certificate on Windows, remove the Sectigo Root R46/E46, and properly bind your SSL certificate to a website using Microsoft IIS. Get step by step instructions with examples.