This article provides details about Intermediate Certificates, such as; who issues them, who sends them, how to install, and links to download them.

Overview Sectigo’s public roots are as widely trusted as any other in the industry. In fact, Sectigo’s root ubiquity is well in excess of 99.99% of systems in use today and is 100% for modern browsers, mobile devices, and operating systems. 

Read this article for a full explanation of cross signing, the AddTrust root expiration, and potential alternatives beyond that expiration date.

This article explains the process for OV Code Signing Validation

This article explains how Domain Control Validation (DCV) is used and must be completed before issuing an SSL certificate

Sectigo Intermediate Certificates - ECC

Currently, secure certificates of any type CANNOT be issued to individuals or business entities in the following countries, websites, or the following country-code-top-level domains (TLDs):

Error code: sec_error_unknown_issuer

The Subject Alternative Name field lets you specify additional host names (sites, IP addresses, common names, etc.) to be protected by a single SSL Certificate

Securing Your Outlook Web Access 2000 Implementation Using SSL