{"id":201,"date":"2026-06-01T23:05:09","date_gmt":"2026-06-02T06:05:09","guid":{"rendered":"https:\/\/hostandtech.com\/kb\/windows-server\/how-to-configure-ssl-certificate-iis\/"},"modified":"2026-06-01T23:05:09","modified_gmt":"2026-06-02T06:05:09","slug":"how-to-configure-ssl-certificate-iis","status":"publish","type":"post","link":"https:\/\/hostandtech.com\/kb\/windows-server\/how-to-configure-ssl-certificate-iis\/","title":{"rendered":"How to Configure SSL Certificate in IIS (Windows Server 2019 \/ 2022)"},"content":{"rendered":"<h2>Overview<\/h2>\n<p>IIS SSL configuration involves two distinct actions that beginners often confuse: <strong>importing<\/strong> the certificate into Windows Certificate Store, and then <strong>binding<\/strong> it to a specific site in IIS. Miss the second step and your site stays on HTTP even though the certificate is sitting right there on the server.<\/p>\n<p>You&#8217;ll need this guide if you&#8217;ve just received an SSL certificate from a CA (Certificate Authority), if you&#8217;re migrating a site to a new Windows Server, or if you&#8217;ve renewed a certificate and your site is throwing an HTTPS error. This also applies if you&#8217;re running a Windows VPS or <a href=\"https:\/\/www.hostandtech.com\/dedicated\/\">Dedicated Server<\/a> and managing IIS yourself.<\/p>\n<p>This article covers IIS 10 on Windows Server 2019 and 2022. The steps are nearly identical on both. IIS 8.5 on Server 2012 R2 follows the same general flow but some UI labels differ slightly.<\/p>\n<h2>Prerequisites<\/h2>\n<ul>\n<li>Remote Desktop (RDP) access to the server with a local Administrator or Domain Admin account<\/li>\n<li>IIS 10 installed and at least one site already configured<\/li>\n<li>Your SSL certificate files \u2014 typically a <code class=\"\" data-line=\"\">.pfx<\/code> file (which bundles the certificate and private key) or a separate <code class=\"\" data-line=\"\">.crt<\/code> \/ <code class=\"\" data-line=\"\">.cer<\/code> file plus the private key<\/li>\n<li>If your CA provided a <code class=\"\" data-line=\"\">.crt<\/code> and a separate key file, you&#8217;ll need to combine them into a <code class=\"\" data-line=\"\">.pfx<\/code> first \u2014 see the note below in Step 1<\/li>\n<li>The password used when the <code class=\"\" data-line=\"\">.pfx<\/code> was exported (if applicable)<\/li>\n<li>DNS for your domain pointed at this server&#8217;s IP and propagated \u2014 HTTPS won&#8217;t work during testing if DNS is still resolving elsewhere<\/li>\n<\/ul>\n<h2>Step-by-Step Instructions<\/h2>\n<h3>Step 1 \u2014 Prepare Your Certificate File<\/h3>\n<p>IIS imports certificates in <code class=\"\" data-line=\"\">.pfx<\/code> format. If your CA sent you a <code class=\"\" data-line=\"\">.crt<\/code> file and a separate private key, you need to merge them first using OpenSSL. If you already have a <code class=\"\" data-line=\"\">.pfx<\/code>, skip to Step 2.<\/p>\n<p>Run the following on any machine with OpenSSL installed (including Windows if you&#8217;ve installed Git Bash or OpenSSL for Windows):<\/p>\n<div class=\"ht-code-snippet\"><button class=\"ht-code-snippet__copy\" type=\"button\" aria-label=\"Copy code\"><\/button><span class=\"ht-code-snippet__feedback\">Copied to clipboard<\/span><\/p>\n<pre class=\"ht-code-snippet__code\" id=\"code-block-1\"><code class=\"\" data-line=\"\">openssl pkcs12 -export \n  -out certificate.pfx \n  -inkey private.key \n  -in certificate.crt \n  -certfile ca_bundle.crt<\/code><\/pre>\n<\/div>\n<p>You&#8217;ll be prompted to set an export password. Don&#8217;t leave it blank \u2014 IIS will accept a blank password, but some CA bundles and intermediate chains won&#8217;t import cleanly without one, and you&#8217;ll get a partial chain that causes browser warnings later.<\/p>\n<p>\ud83d\udcdd Note: The <code class=\"\" data-line=\"\">ca_bundle.crt<\/code> file contains the intermediate certificates your CA provided. Including it in the <code class=\"\" data-line=\"\">.pfx<\/code> ensures IIS presents the full chain to browsers. If you skip it, Chrome and Firefox may show a trust error even though the certificate itself is valid.<\/p>\n<h3>Step 2 \u2014 Import the Certificate into Windows Certificate Store<\/h3>\n<ol>\n<li>Press <strong>Win + R<\/strong>, type <code class=\"\" data-line=\"\">mmc<\/code>, and press Enter to open the Microsoft Management Console.<\/li>\n<li>Go to <strong>File &gt; Add\/Remove Snap-in<\/strong>.<\/li>\n<li>Select <strong>Certificates<\/strong> from the left list, click <strong>Add<\/strong>.<\/li>\n<li>Choose <strong>Computer account<\/strong> when prompted, then <strong>Local computer<\/strong>. Click <strong>Finish<\/strong>, then <strong>OK<\/strong>.<\/li>\n<li>In the left panel, expand <strong>Certificates (Local Computer) &gt; Personal &gt; Certificates<\/strong>.<\/li>\n<li>Right-click the <strong>Certificates<\/strong> folder under Personal, then select <strong>All Tasks &gt; Import<\/strong>.<\/li>\n<li>Follow the wizard: browse to your <code class=\"\" data-line=\"\">.pfx<\/code> file, enter the export password, and make sure <strong>Mark this key as exportable<\/strong> is checked if you might need to migrate this cert later.<\/li>\n<li>Set the certificate store to <strong>Personal<\/strong> and complete the import.<\/li>\n<\/ol>\n<p>\u26a0 Warning: Do not import into the <strong>Web Hosting<\/strong> store unless you specifically need SNI with a large number of certificates and know what you&#8217;re doing. Certificates imported there behave differently in the IIS binding UI and can cause the binding dropdown to show the cert as unavailable.<\/p>\n<h3>Step 3 \u2014 Bind the Certificate to Your IIS Site<\/h3>\n<ol>\n<li>Open <strong>IIS Manager<\/strong> \u2014 search for it in the Start menu or run <code class=\"\" data-line=\"\">inetmgr<\/code> from Win + R.<\/li>\n<li>In the left <strong>Connections<\/strong> panel, expand your server name, then expand <strong>Sites<\/strong>.<\/li>\n<li>Click on the site you want to secure.<\/li>\n<li>In the right <strong>Actions<\/strong> panel, click <strong>Bindings<\/strong>.<\/li>\n<li>In the Site Bindings window, click <strong>Add<\/strong>.<\/li>\n<li>Set the following:\n<ul>\n<li><strong>Type:<\/strong> https<\/li>\n<li><strong>IP address:<\/strong> All Unassigned (or a specific IP if you&#8217;re hosting multiple sites on the same server with separate IPs)<\/li>\n<li><strong>Port:<\/strong> 443<\/li>\n<li><strong>Host name:<\/strong> Enter your domain name exactly \u2014 e.g. <code class=\"\" data-line=\"\">example.com<\/code>. This enables SNI (Server Name Indication), which is required if multiple HTTPS sites share the same IP.<\/li>\n<li><strong>SSL certificate:<\/strong> Select the certificate you just imported from the dropdown<\/li>\n<\/ul>\n<\/li>\n<li>Check <strong>Require Server Name Indication<\/strong> if you&#8217;re on a shared IP. If this server hosts only one HTTPS site or has a dedicated IP, you can leave it unchecked.<\/li>\n<li>Click <strong>OK<\/strong>, then <strong>Close<\/strong>.<\/li>\n<\/ol>\n<p>\ud83d\udcdd Note: If your certificate doesn&#8217;t appear in the SSL certificate dropdown, the import likely went into the wrong store. Go back to MMC and verify the cert is under <strong>Personal &gt; Certificates<\/strong>, not <strong>Web Hosting<\/strong> or <strong>Trusted Root<\/strong>.<\/p>\n<h3>Step 4 \u2014 Force HTTPS with an HTTP Redirect (Recommended)<\/h3>\n<p>Binding to port 443 enables HTTPS but doesn&#8217;t automatically redirect HTTP traffic. You&#8217;ll need to add a redirect rule. The cleanest way is via the <code class=\"\" data-line=\"\">web.config<\/code> file in your site&#8217;s root directory.<\/p>\n<p>Open or create <code class=\"\" data-line=\"\">C:inetpubwwwrootYourSiteweb.config<\/code> and add the following inside the <code class=\"\" data-line=\"\">&lt;system.webServer&gt;<\/code> section:<\/p>\n<div class=\"ht-code-snippet\"><button class=\"ht-code-snippet__copy\" type=\"button\" aria-label=\"Copy code\"><\/button><span class=\"ht-code-snippet__feedback\">Copied to clipboard<\/span><\/p>\n<pre class=\"ht-code-snippet__code\" id=\"code-block-2\"><code class=\"\" data-line=\"\">&lt;rewrite&gt;\n  &lt;rules&gt;\n    &lt;rule name=&quot;HTTP to HTTPS&quot; stopProcessing=&quot;true&quot;&gt;\n      &lt;match url=&quot;(.*)&quot; \/&gt;\n      &lt;conditions&gt;\n        &lt;add input=&quot;{HTTPS}&quot; pattern=&quot;^OFF$&quot; \/&gt;\n      &lt;\/conditions&gt;\n      &lt;action type=&quot;Redirect&quot; url=&quot;https:\/\/{HTTP_HOST}\/{R:1}&quot; redirectType=&quot;Permanent&quot; \/&gt;\n    &lt;\/rule&gt;\n  &lt;\/rules&gt;\n&lt;\/rewrite&gt;<\/code><\/pre>\n<\/div>\n<p>\u26a0 Warning: This requires the <strong>URL Rewrite<\/strong> module to be installed in IIS. If it&#8217;s not installed, this rule will throw a 500.19 error. Download it from the official Microsoft site or install it via Web Platform Installer.<\/p>\n<h3>Step 5 \u2014 Verify the Configuration<\/h3>\n<p>Open a browser and navigate to <code class=\"\" data-line=\"\">https:\/\/yourdomain.com<\/code>. You should see the padlock icon. To check the full certificate chain and expiry from the command line:<\/p>\n<div class=\"ht-code-snippet\"><button class=\"ht-code-snippet__copy\" type=\"button\" aria-label=\"Copy code\"><\/button><span class=\"ht-code-snippet__feedback\">Copied to clipboard<\/span><\/p>\n<pre class=\"ht-code-snippet__code\" id=\"code-block-3\"><code class=\"\" data-line=\"\"># Run in PowerShell on the server\n$req = [System.Net.HttpWebRequest]::Create(&quot;https:\/\/yourdomain.com&quot;)\n$req.GetResponse() | Out-Null\n$cert = $req.ServicePoint.Certificate\nWrite-Host &quot;Issued to: $($cert.Subject)&quot;\nWrite-Host &quot;Expires: $($cert.GetExpirationDateString())&quot;<\/code><\/pre>\n<\/div>\n<p>You can also use an external tool like SSL Labs (ssllabs.com\/ssltest) to verify chain completeness and check your TLS configuration grade.<\/p>\n<h2>Common Issues &amp; Troubleshooting<\/h2>\n<h3>Certificate doesn&#8217;t appear in the IIS binding dropdown<\/h3>\n<p>This almost always means the certificate was imported into the wrong store. IIS only shows certificates from <strong>Local Computer &gt; Personal<\/strong> in the standard binding dropdown. Open MMC, confirm the cert location, and reimport if needed. Also check that the certificate has a private key associated \u2014 if you imported a <code class=\"\" data-line=\"\">.crt<\/code> without the key, it&#8217;ll appear in the store but IIS won&#8217;t offer it for binding.<\/p>\n<h3>ERR_SSL_PROTOCOL_ERROR or &#8220;This site can&#8217;t provide a secure connection&#8221;<\/h3>\n<p>Usually caused by a binding that exists in IIS but points to no certificate, or a corrupted binding entry. Open a PowerShell prompt as Administrator and check the current SSL bindings at the HTTP.sys level:<\/p>\n<div class=\"ht-code-snippet\"><button class=\"ht-code-snippet__copy\" type=\"button\" aria-label=\"Copy code\"><\/button><span class=\"ht-code-snippet__feedback\">Copied to clipboard<\/span><\/p>\n<pre class=\"ht-code-snippet__code\" id=\"code-block-4\"><code class=\"\" data-line=\"\">netsh http show sslcert<\/code><\/pre>\n<\/div>\n<p>If you see a binding for port 443 with a null or mismatched certificate hash, delete it and re-add via IIS Manager. Stale bindings from a previous certificate don&#8217;t always get cleaned up automatically.<\/p>\n<h3>Mixed content warnings after enabling HTTPS<\/h3>\n<p>The certificate and binding are fine, but the page is loading HTTP resources (images, scripts, stylesheets). This is an application-level issue, not an IIS issue. You&#8217;ll need to update hardcoded HTTP URLs in your application or CMS. For WordPress on IIS, updating the site URL in the database usually handles the majority of it.<\/p>\n<h3>500.19 error after adding web.config redirect rule<\/h3>\n<p>The URL Rewrite module isn&#8217;t installed. The <code class=\"\" data-line=\"\">web.config<\/code> references a module IIS doesn&#8217;t recognise and returns a configuration error. Install URL Rewrite 2.1 from Microsoft&#8217;s download centre, then recycle the application pool. No server restart needed.<\/p>\n<h3>Certificate renewed but browser still shows old cert<\/h3>\n<p>After importing a renewed certificate, you have to update the binding manually. IIS doesn&#8217;t automatically swap to the new cert just because it has the same domain name. Go back to <strong>Site Bindings<\/strong>, edit the HTTPS binding, and reselect the certificate from the dropdown. The renewed cert and the old cert will both show up \u2014 check the expiry dates to make sure you&#8217;re selecting the right one.<\/p>\n<h2>FAQ<\/h2>\n<div class=\"ht-faq-section\">\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"ht-faq-item\">\n<h3 class=\"ht-faq-question\">Do I need a separate SSL certificate for each IIS site on the same server?<\/h3>\n<div class=\"ht-faq-answer\">\n<p>Not necessarily. A wildcard certificate (e.g. *.example.com) covers all subdomains under one domain, and a multi-domain SAN certificate can cover multiple different domains in one cert. If you&#8217;re running completely separate domains on the same server, you&#8217;ll need either a SAN cert or individual certificates for each, combined with SNI bindings so IIS knows which cert to serve to which domain.<\/p>\n<\/div>\n<\/div>\n<div class=\"ht-faq-item\">\n<h3 class=\"ht-faq-question\">How do I renew an SSL certificate in IIS without downtime?<\/h3>\n<div class=\"ht-faq-answer\">\n<p>Import the new certificate into the Personal store first, then update the binding to point to it \u2014 the whole switchover takes seconds. There&#8217;s no need to remove the old certificate before you&#8217;ve confirmed the new one is working. Once you&#8217;ve verified HTTPS is serving the renewed cert, you can delete the expired one from the store.<\/p>\n<\/div>\n<\/div>\n<div class=\"ht-faq-item\">\n<h3 class=\"ht-faq-question\">Why does my SSL certificate show as valid but browsers still warn about it?<\/h3>\n<div class=\"ht-faq-answer\">\n<p>The most common cause is a missing intermediate certificate chain. If the CA&#8217;s intermediate certs weren&#8217;t included when you exported the .pfx, browsers that don&#8217;t have the intermediate cached will show a trust warning. Rebuild the .pfx using OpenSSL with the ca_bundle.crt included (see Step 1), reimport, and update the binding.<\/p>\n<\/div>\n<\/div>\n<div class=\"ht-faq-item\">\n<h3 class=\"ht-faq-question\">Can I use a Let&#039;s Encrypt certificate with IIS?<\/h3>\n<div class=\"ht-faq-answer\">\n<p>Yes. The easiest way is with win-acme (formerly letsencrypt-win-simple), a free tool that handles domain validation, certificate issuance, and IIS binding automatically. It also sets up a scheduled task for auto-renewal before the 90-day expiry. You&#8217;ll find it at win-acme.com. I&#8217;d recommend it over manual Let&#8217;s Encrypt workflows on Windows \u2014 doing it by hand every 90 days gets old fast.<\/p>\n<\/div>\n<\/div>\n<div class=\"ht-faq-item\">\n<h3 class=\"ht-faq-question\">What port does HTTPS use and do I need to open it in the firewall?<\/h3>\n<div class=\"ht-faq-answer\">\n<p>HTTPS runs on TCP port 443. On a Windows Server, Windows Defender Firewall may block inbound 443 by default depending on how the server was set up. Check by going to Windows Defender Firewall with Advanced Security and looking for an inbound rule allowing TCP 443. If it&#8217;s missing, add one. On a Host &amp; Tech dedicated server, you can also manage firewall rules through your server control panel.<\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Configuring SSL in IIS isn&#8217;t difficult, but the binding step trips up a lot of people \u2014 especially when a certificate imports successfully but the site still serves HTTP. This guide walks through the full process on Windows Server 2019 and 2022.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[84],"tags":[498,501,81,85,499,500,103,67],"class_list":["post-201","post","type-post","status-publish","format-standard","hentry","category-windows-server","tag-certificate-binding","tag-how-to-configure-ssl-certificate-in-iis-windows-server-2019-2022","tag-https","tag-iis","tag-iis-manager","tag-iis-ssl-certificate-binding","tag-ssl-certificate","tag-windows-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Configure SSL Certificate in IIS (Windows Server 2019 \/ 2022)<\/title>\n<meta name=\"description\" content=\"Step-by-step guide to configuring IIS SSL and certificate binding on Windows Server 2019 and 2022. 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