This tutorial explains how to install an SSL certificate for Microsoft 365 (Office 365). The important part comes first: you do not, and cannot, upload an SSL certificate into the Microsoft 365 cloud itself. Microsoft manages TLS for Exchange Online, SharePoint Online, and the other hosted services. You manage commercial certificates only on the servers, […]
In this guide, you will learn how to install an SSL/TLS certificate on Microsoft Exchange Server. We cover the modern method for Exchange 2016, 2019, and the new Exchange Server Subscription Edition (SE), plus archival steps for legacy versions.
This guide shows you how to install an SSL/TLS certificate on NGINX. It covers the part that trips most people up: building the correct certificate chain (“fullchain”) that NGINX requires, pointing the right directives at the right files, testing the configuration before reloading, and adding a clean HTTP to HTTPS redirect so every visitor lands […]
This guide shows you how to install an SSL certificate on Microsoft IIS (Internet Information Services) on Windows Server. It covers both ways a certificate reaches IIS: completing a pending request from a .cer or .p7b file, and importing a .pfx file that already contains the private key. It also includes a PowerShell method and […]
This guide explains how to install an SSL certificate on a Debian server with Apache. How to generate CSR for a Debian server? Before installation, your first task is to generate a CSR (Certificate Signing Request) code. This is the standard procedure when applying for an SSL Certificate. The CSR contains relevant details about your […]
This guide gives you step-by-step instructions on how to install an SSL certificate in cPanel. cPanel is one of the most widely used web hosting control panels, and the SSL installation is straightforward even without advanced technical skills.
In this tutorial, you will learn how to install an SSL certificate in AWS (Amazon Web Services). On AWS you do not install a certificate on a single server the way you would with Apache or Nginx. Instead, you import the certificate once into a certificate store, then attach it to a managed service (a […]
Thunderbird has supported S/MIME for as long as it has existed, and it handles it differently from Outlook in one way that determines everything else: it keeps its own certificate store. Nothing you install into Windows, macOS or your Linux keyring will show up in Thunderbird, and nothing you import into Thunderbird appears anywhere else. […]
An S/MIME certificate lets you digitally sign your emails, so recipients can tell the message really came from you and was not altered, and encrypt them, so only the intended recipient can read them. It is an email certificate, not the SSL/TLS certificate that secures a website, and the two are not interchangeable even though […]
Certificates pile up in Windows. A test certificate from a project that ended, a corporate root left behind by software you uninstalled, an expired certificate on a web server, a client certificate that no longer authenticates anything. Removing them is straightforward once you know two things: which of the several certificate stores it is actually […]