{"id":3555,"date":"2021-09-17T22:39:00","date_gmt":"2021-09-17T22:39:00","guid":{"rendered":"https:\/\/www.cigatisolutions.com\/blog\/?p=3555"},"modified":"2023-10-25T09:34:50","modified_gmt":"2023-10-25T09:34:50","slug":"proven-way-to-fix-outlook-certificate-error","status":"publish","type":"post","link":"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/","title":{"rendered":"How to Fix Outlook Security Certificate Error?"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;3555&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;2&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;4.5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;4.5\\\/5 - (2 votes)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;How to Fix Outlook Security Certificate Error?&quot;,&quot;width&quot;:&quot;128&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 128px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            4.5\/5 - (2 votes)    <\/div>\n    <\/div>\n<p>In the fast-paced world of modern communication, email has become the backbone of our daily interactions. For millions of users, Microsoft Outlook is the trusted companion that simplifies managing emails, calendars, and contacts. Yet, even the most reliable software can occasionally throw a wrench into our productivity. One common roadblock that Outlook users encounter is the perplexing &#8220;Outlook Certificate Error.&#8221; In this comprehensive guide, we unravel the mystery behind this error, uncover its causes, and provide practical steps to help you overcome it effortlessly.<\/p>\n<p>An Outlook Certificate Error occurs when Outlook encounters an issue with the security certificate associated with the email account or the mail server it&#8217;s connecting to. This error can manifest in various ways, including warning messages that disrupt your email workflow. Now, we\u2019ll look for the possible reasons for causing this issue.<\/p>\n<p><strong>Also Read:<\/strong> <a href=\"https:\/\/www.cigatisolutions.com\/blog\/fix-outlook-inbox-repair-tool-not-responding\/\">Microsoft Outlook Inbox Repair Tool Not Responding<\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#How_is_Outlook_Security_Certificate_Error_Caused\" >How is Outlook Security Certificate Error Caused?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#How_to_Fix_Outlook_Security_Certificate_Error\" >How to Fix Outlook Security Certificate Error?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#Method_1_Correct_Certificate_Name\" >Method 1: Correct Certificate Name<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#Method_2_By_Using_the_Domain_Name_of_the_Host_Company_as_the_Server\" >Method 2: By Using the Domain Name of the Host Company as the Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#Method_3_Adding_Non-SSL_Ports\" >Method 3: Adding Non-SSL Ports<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#Method_4_Changing_the_Outgoing_SMTP_Port\" >Method 4: Changing the Outgoing SMTP Port<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/#End_Words\" >End Words<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_is_Outlook_Security_Certificate_Error_Caused\"><\/span>How is Outlook Security Certificate Error Caused?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Here&#8217;s a breakdown of the most common causes of these errors:<\/p>\n<ol>\n<li>Expired SSL Certificate: SSL (Secure Sockets Layer) certificates are used to establish a secure connection between Outlook and the email server. If the certificate expires, the application will generate a Certificate Warnings in Outlook error.<\/li>\n<li>Mismatched Hostname: If the hostname on the certificate does not match the hostname used in the email server&#8217;s settings, Outlook will flag it as a security risk.<\/li>\n<li>Incorrect System Date and Time: A mismatch between your computer&#8217;s date and time settings and the certificate&#8217;s validity period can trigger an Outlook Certificate Error keeps Popping Up.<\/li>\n<li>Self-Signed Certificates: Self-signed certificates, while functional, can raise security concerns. Outlook may display a warning when connecting to a server using a self-signed certificate.<\/li>\n<li>Trust Issues: If Outlook doesn&#8217;t trust the certificate authority that issued the SSL certificate, it will trigger an error.<\/li>\n<\/ol>\n<p>Now that we understand the possible causes. Let&#8217;s move on to the solutions.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Fix_Outlook_Security_Certificate_Error\"><\/span>How to Fix Outlook Security Certificate Error?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You can utilize the below-mentioned manual solutions to fix the Outlook error. They are briefed for you. As a result, you can understand and execute them effectively.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Method_1_Correct_Certificate_Name\"><\/span>Method 1: Correct Certificate Name<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It is a verification method to reduce the possibility of the Outlook certificate error. Ensure that the name on the certificate and the mail server are the same to fix the error. The connection between the server and the email client is established correctly only when the name matches both. You can follow the below steps to verify the certificate name.<\/p>\n<ul>\n<li>When the security error pops up, click on the View Certificate option.<\/li>\n<li>Now, choose the Issue to Name option and verify if the name is the same on both the mail server and the certificate.<\/li>\n<li>If it is unique, you can change the name and restart the application.<\/li>\n<\/ul>\n<p>You should also note that if the certificate displays multiple names, try to enter each name at least once. Moreover, the above solution will help you to fix the Security Certificate Error in Outlook.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Method_2_By_Using_the_Domain_Name_of_the_Host_Company_as_the_Server\"><\/span>Method 2: By Using the Domain Name of the Host Company as the Server<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As the shared web hosting company manages several mail servers on various domains, it can lead to certificate issues. The mail server address remains the same for all the niches, creating a problem for the security certificates. Moreover, the web hosting company does not intend to alter the SSL for each domain owing to its cost, and they do it only for their domain name.<\/p>\n<p>Hence, the Outlook certificate error appears, and your email services are disrupted. Choosing the hosting company\u2019s domain name as your mail server is advised.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Method_3_Adding_Non-SSL_Ports\"><\/span>Method 3: Adding Non-SSL Ports<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>For privacy and security reasons, some networks block certain popular mail servers and SSL ports like SSL POP port 995, IMAP 993, and SMTP 465. It happens mostly in schools, colleges, and universities, which leads to the Outlook certificate error Office 365.<\/p>\n<p>In such scenarios, you can take the help of the non-SSL ports and add them instead. Users can utilize these ports and try connecting them as they may not blocked on the network. We have listed some non-SSL ports that you can make use of.<\/p>\n<p>POP Non-SSL Port: 110<\/p>\n<p>IMAP Non-SSL Port: 143<\/p>\n<p>SMTP Non SSL Port: 587<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Method_4_Changing_the_Outgoing_SMTP_Port\"><\/span>Method 4: Changing the Outgoing SMTP Port<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can fix the Outlook certificate error issue by changing the Outgoing SMTP Port number and settings. Some outgoing ports are blocked in order to spam or other reasons that prevent proper connection. Follow the below-listed steps to change the outgoing SMTP Port in Outlook.<\/p>\n<ul>\n<li>Run the Outlook application on your system and click on the File tab.<\/li>\n<li>Now, click on the Info option and select Account Settings.<\/li>\n<li>Click on Account Settings in the drop-down.<\/li>\n<li>After that, choose your email ID and press the Change button.<\/li>\n<li>In the new tab, press the More Settings icon.<\/li>\n<li>Pick the Advanced tab in the Internet Email Settings window.<\/li>\n<li>Here, change the Outgoing Server (SMTP) option as per your choice and tap on OK.<\/li>\n<\/ul>\n<p><strong>Note:<\/strong> We suggest you not install any certificate until and unless it is a particular certificate that caters to only a selective email server. Also, you should only install a certificate if it is a custom one. It is also recommended to undertake the auto-discover configuration to examine the Outlook certificate error auto-discover issue.<\/p>\n<p>If you are not able to resolve your Outlook certificate error using the above manual solutions, then there may be a possibility that your PST file is corrupted. Sometimes, the Outlook security certificate error arises due to the corruption in the PST files.<\/p>\n<p>To get rid of this problem, you can use the <strong>Cigati <a href=\"https:\/\/www.cigatisolutions.com\/outlook-email-recovery\/\">PST Repair Tool<\/a><\/strong>. It is a well-sought software that can recover and repair your corrupt and damaged Outlook PST files in an instant way.<\/p>\n<div class=\"text-center\"><a href=\"https:\/\/www.cigatisolutions.com\/demo-version\/Cigati-Outlook-Email-Recovery-Demo.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone my-3 wp-image-4130 size-full\" src=\"https:\/\/www.cigatisolutions.com\/blog\/wp-content\/uploads\/2021\/11\/downlad-btn-new.png\" alt=\"Download Now\" width=\"163\" height=\"40\" \/><\/a>\u00a0 \u00a0 <a href=\"https:\/\/www.cigatisolutions.com\/outlook-email-recovery\/purchase-now.html\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone my-3 wp-image-4129 size-full\" src=\"https:\/\/www.cigatisolutions.com\/blog\/wp-content\/uploads\/2021\/11\/buy-btn-new.png\" alt=\"Buy Now\" width=\"163\" height=\"40\" \/><\/a><\/div>\n<h4><span class=\"ez-toc-section\" id=\"End_Words\"><\/span>End Words<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Outlook Certificate Errors can be frustrating, but with the right troubleshooting steps, they can be resolved swiftly. By addressing issues like expired certificates, hostname mismatches, and trust problems, you can ensure a secure and uninterrupted email experience. Remember, keeping your software up-to-date and maintaining accurate system settings is key to preventing such errors in the future.<\/p>\n\n\n<p><strong>You May Also Read:<\/strong> <a href=\"https:\/\/www.cigatisolutions.com\/blog\/outlook-not-sending-emails\/\">Outlook Not Sending Emails Error on Windows 10<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the fast-paced world of modern communication, email has become the backbone of our daily interactions. For millions of users,<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":8479,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[110],"class_list":["post-3555","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-file-recovery-repair","tag-outlook-certificate-error"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>4 Expert Solutions to Fix Outlook Security Certificate Error<\/title>\n<meta name=\"description\" content=\"Learn about Outlook Certificate Error and how to fix them with 4 expert-recommended methods in a few simple steps.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"4 Expert Solutions to Fix Outlook Security Certificate Error\" \/>\n<meta property=\"og:description\" content=\"Learn about Outlook Certificate Error and how to fix them with 4 expert-recommended methods in a few simple steps.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cigatisolutions.com\/blog\/proven-way-to-fix-outlook-certificate-error\/\" \/>\n<meta property=\"og:site_name\" content=\"Cigati Solutions Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-09-17T22:39:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-10-25T09:34:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.cigatisolutions.com\/blog\/wp-content\/uploads\/2021\/09\/How-to-Fix-Outlook-Security-Certificate-Error.png\" \/>\n\t<meta property=\"og:image:width\" content=\"698\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Rohit Singh\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Rohit Singh\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/proven-way-to-fix-outlook-certificate-error\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/proven-way-to-fix-outlook-certificate-error\\\/\"},\"author\":{\"name\":\"Rohit Singh\",\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/#\\\/schema\\\/person\\\/54508274421f78cd785d975e3d500a01\"},\"headline\":\"How to Fix Outlook Security Certificate Error?\",\"datePublished\":\"2021-09-17T22:39:00+00:00\",\"dateModified\":\"2023-10-25T09:34:50+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/proven-way-to-fix-outlook-certificate-error\\\/\"},\"wordCount\":1032,\"publisher\":{\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/proven-way-to-fix-outlook-certificate-error\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.cigatisolutions.com\\\/blog\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/How-to-Fix-Outlook-Security-Certificate-Error.png\",\"keywords\":[\"Outlook certificate error\"],\"articleSection\":[\"File Recovery &amp; 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