{"id":58,"date":"2024-08-22T06:01:19","date_gmt":"2024-08-22T06:01:19","guid":{"rendered":"https:\/\/imapmigrator.com\/blog\/?p=58"},"modified":"2024-08-23T10:58:09","modified_gmt":"2024-08-23T10:58:09","slug":"fix-outlook-is-unable-to-connect-to-the-proxy-server-error-code-0","status":"publish","type":"post","link":"https:\/\/imapmigrator.com\/blog\/fix-outlook-is-unable-to-connect-to-the-proxy-server-error-code-0\/","title":{"rendered":"Fix &#8211; Outlook is Unable to Connect to the Proxy Server Error Code 0"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nowadays, the most frequently used email program is Microsoft Outlook. But, it is not always easy to work with Outlook applications. At certain times, users face various issues while working, which primarily lead to the occurrence of errors. Out of them, one such error message is Outlook is Unable to Connect to the Proxy Server error code 0. Therefore, in this blog, we are going to discuss manual approaches using which a user can easily fix this error in a hassle-free way. Before that, let us understand all the possible reasons behind this type of error.<\/span><\/p>\n<h2 style=\"text-align: justify;\">Overview of Generating Error Messages<\/h2>\n<p style=\"text-align: justify;\">M<span style=\"font-weight: 400;\">any times, when MS Outlook connects to the server via RPC (Remote Procedure Call) connection or HTTP connection, it generates the following message:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">There is an issue with the proxy server\u2019s security certificate due to which this error Outlook is not able to connect to the proxy server error code 0 occurs.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Sometimes, the name on the security certificate is invalid or does not matches the name of a website. This leads to the generation of this error.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-59 size-full\" src=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/hi.png\" alt=\"outlook is unable to connect\" width=\"464\" height=\"198\" srcset=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/hi.png 464w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/hi-300x128.png 300w\" sizes=\"auto, (max-width: 464px) 100vw, 464px\" \/><\/p>\n<ul style=\"text-align: justify;\">\n<li><span style=\"font-weight: 400;\">A problem that comes with a proxy server\u2019s security certificate. This security certificate is not from a trusted certifying authority. Therefore, the following error message appears Outlook is unable to connect to the proxy server error code 0.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-60 size-full\" src=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/ms.png\" alt=\"Outlook is Unable to Connect to the Proxy Server error \" width=\"450\" height=\"203\" srcset=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/ms.png 450w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/ms-300x135.png 300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/p>\n<blockquote><p><em><strong>Quick Tip:<\/strong> Have trouble migrating data from one platform to another? Choose <strong><a href=\"https:\/\/imapmigrator.com\/\" target=\"_blank\" rel=\"noopener\">IMAP Email Migration Tool<\/a><\/strong> to effortlessly migrate from and to all email servers.\u00a0<\/em><\/p>\n<p class=\"text-center\"><a class=\"btn btn-success btn-lg btn-md-block text-white p-3\" style=\"color: #fff !important;\" href=\"https:\/\/imapmigrator.com\/download\/SYS3M9I7M\/590\" rel=\"nofollow\">Free Download<\/a> <a class=\"btn btn-lg btn-md-block text-white p-3\" style=\"background: #ff6800; color: #fff !important;\" href=\"https:\/\/imapmigrator.com\/buy\/SYS3M9I7M\/590\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Purchase Now<\/a><\/p>\n<\/blockquote>\n<h2>Outlook is Unable to Connect to the Server \u2013 Common Grounds<\/h2>\n<p style=\"text-align: justify;\">T<span style=\"font-weight: 400;\">here are so many reasons behind the occurrence of errors. These errors may occur in case any of the following conditions exist:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The certification authority is not trusted at the root.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A certification authority (CA) is essential in order to connect to the server.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">There are more chances that the certificates stand invalid.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The certificate does not match the name of the website to which the connection is made.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A third-party browser or add-ins are preventing access to a particular site.<\/span><\/li>\n<\/ol>\n<blockquote><p><strong>Also Read: How to Resolve <a href=\"https:\/\/imapmigrator.com\/blog\/fix-email-server-imap-gmail-com-is-not-responding-in-iphone-error\/\" target=\"_blank\" rel=\"noopener\">imap.gmail.com is not responding in iPhone<\/a>?<\/strong><\/p><\/blockquote>\n<h3 style=\"text-align: justify;\">Solutions to Fix Outlook is Not Able to Connect to the Proxy Server Error Code 0<\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Go through the following methods by which users can overcome this error. Let us have a look:<\/span><\/p>\n<h3>1. Check &amp; Analyze the Certificate<\/h3>\n<p><span style=\"font-weight: 400;\">In any case, users may encounter either Error 1 or 2, we recommend analyzing the certificate thoroughly. There are two things that a user must verify in the certificates. Initially, a certificate should not expire and secondly, the information in the Subject field must match with a site name. Follow the below-described steps to analyze the certificate if <\/span><span style=\"font-weight: 400;\">there is a problem with the proxy server&#8217;s security certificate<\/span><span style=\"font-weight: 400;\">:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Under the Address Bar of Internet Explorer, enter this site <\/span><b>https:\/\/www.[server_name].com\/RPC<\/b><span style=\"font-weight: 400;\">. Then, <\/span><b>click Enter<\/b><span style=\"font-weight: 400;\"> and connect to the <\/span><b>RPC server<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In the lower corner of a <\/span><b>web browser<\/b><span style=\"font-weight: 400;\">, double-click<\/span><b> and choose the padlock icon<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">After that, you can <\/span><b>select<\/b><span style=\"font-weight: 400;\"> the <\/span><b>option Details<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Under the dialog box, <\/span><b>check<\/b><span style=\"font-weight: 400;\"> the <\/span><b>Certificate validation date and Subject<\/b><span style=\"font-weight: 400;\"> as well. In any case, if a certificate has expired, contact your system administrator. In case, the subject field does not match, then changes are made as required<\/span><\/li>\n<\/ul>\n<h3>2. Installation of a Trusted Root Certificate<\/h3>\n<p><span style=\"font-weight: 400;\">You can follow the below-stated approach in case you receive Error 3:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Under the <\/span><b>Certificate dialog box<\/b><span style=\"font-weight: 400;\">, choose the <\/span><b>Install Certificate<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Now, <\/span><b>place all certificates<\/b><span style=\"font-weight: 400;\"> in the following store to be checked<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Select <\/span><b>Browse option<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Choose<\/b><span style=\"font-weight: 400;\"> the <\/span><b>Trusted Root Certification Authority option<\/b><span style=\"font-weight: 400;\"> and press the <\/span><b>OK<\/b><span style=\"font-weight: 400;\"> button<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Press <\/span><b>Next<\/b><span style=\"font-weight: 400;\"> and then, Finish completing the process.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">If these steps unable to resolve the issue, then <\/span><span style=\"font-weight: 400;\">add the certificate snap-in to MMC.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Press <\/span><b>Windows + R<\/b><span style=\"font-weight: 400;\"> and type <\/span><b>MMC <\/b><span style=\"font-weight: 400;\">then Yes.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Move to<\/span><b> File &gt; Add\/Remove Snap-ins<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Choose <\/span><b>Certificates <\/b><span style=\"font-weight: 400;\">and then choose the <\/span><b>Add <\/b><span style=\"font-weight: 400;\">option.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Open <\/span><b>My User <\/b><span style=\"font-weight: 400;\">account and select Add the <\/span><b>Computer Account<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Now, move the certificate from <\/span><b>Certificates-Current User &gt; Trusted Root Certification Authorities into Certificates (Local Computer)&gt; Trusted Root Certification Authorities<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<h3>3. Disable Third-Party Browser and Add-in<\/h3>\n<p><span style=\"font-weight: 400;\">All these errors can also be removed, by disabling a third-party browser and add-in. Let us have a look:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Select<\/b><span style=\"font-weight: 400;\"> the <\/span><b>Start icon<\/b><span style=\"font-weight: 400;\"> and then, choose <\/span><b>Run<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In the dialog box, <\/span><b>type outlook.exe \/safe<\/b><span style=\"font-weight: 400;\"> and click the <\/span><b>Ok<\/b><span style=\"font-weight: 400;\"> button. This can <\/span><b>start MS Outlook in safe mode<\/b><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-713\" src=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/run.png\" alt=\"run Outlook\" width=\"467\" height=\"264\" srcset=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/run.png 556w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/run-300x169.png 300w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/run-400x225.png 400w\" sizes=\"auto, (max-width: 467px) 100vw, 467px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In any case, if Outlook starts in Safe mode, then undoubtedly the issue is caused by third-party add-ons and the only way is to disable them.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">To disable the third-party add-ons, follow the below-stated steps:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Run MS Outlook<\/b><span style=\"font-weight: 400;\"> and then the <\/span><b>File tab<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Click on <\/span><b>Options<\/b><span style=\"font-weight: 400;\"> and <\/span><b>select<\/b><span style=\"font-weight: 400;\"> the <\/span><b>Add-ins option<\/b><span style=\"font-weight: 400;\"> from the left-side menu<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In the Add-ins window, choose the<\/span><b> COM Add-ins<\/b><span style=\"font-weight: 400;\"> in the Manage box and <\/span><b>Go<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-711\" src=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/addins.png\" alt=\"add-ins\" width=\"700\" height=\"573\" srcset=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/addins.png 1231w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/addins-300x246.png 300w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/addins-1024x838.png 1024w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/addins-768x629.png 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Under the Add-ins segment, select and remove add-ins that you want to disable<\/span><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-712\" src=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/cad.png\" alt=\"remove add-ins\" width=\"644\" height=\"231\" srcset=\"https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/cad.png 898w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/cad-300x108.png 300w, https:\/\/imapmigrator.com\/blog\/wp-content\/uploads\/2018\/07\/cad-768x275.png 768w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Close<\/b><span style=\"font-weight: 400;\"> and then, <\/span><b>restart MS Outlook<\/b><\/li>\n<\/ul>\n<h4>Final Thoughts<\/h4>\n<p><span style=\"font-weight: 400;\">Outlook is a desktop-based email client, but at times, working over it is quite challenging. In this blog, we have discussed three different methods by which users can fix Outlook is unable to connect to the proxy server error code 0 in an absolute way. Further, we have explained all the possible reasons behind the occurrence of this error.<\/span><\/p>\n<h4>Frequently Asked Questions<\/h4>\n<p><b>Q1. Can I restore my certificates in Outlook?<\/b><\/p>\n<p><span style=\"font-weight: 400;\"><strong>A &#8211;<\/strong> Yes, you can restore your certificates in Outlook by using the below steps:-<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 1. <\/b><span style=\"font-weight: 400;\">Open Control Panel and then System.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 2.<\/b><span style=\"font-weight: 400;\"> Move to Security and Certificate &amp; Private Key.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 3.<\/b><span style=\"font-weight: 400;\"> Now hit on Restore to Default and then press OK.<\/span><\/li>\n<\/ul>\n<p><b>Q2. Should I remove third-party add-ins from Outlook to resolve that Outlook is unable to Connect to the Proxy Server Error Code 0?<\/b><\/p>\n<p><b>A &#8211; <\/b><span style=\"font-weight: 400;\">of course, removing third-party add-ins can resolve this error. Below are the steps to remove the Add-ins.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 1.<\/b><span style=\"font-weight: 400;\"> Launch Outlook &gt; File.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 2.<\/b><span style=\"font-weight: 400;\"> Go to Options &gt; Add-ins.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 3.<\/b><span style=\"font-weight: 400;\"> In the Managed Box, choose COM Add-ins.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Step 4.<\/b><span style=\"font-weight: 400;\"> Then start removing them and restart Outlook.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Nowadays, the most frequently used email program is Microsoft Outlook. But, it is not always easy to work with Outlook <\/p>\n","protected":false},"author":6,"featured_media":710,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-58","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-errors"],"_links":{"self":[{"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/posts\/58","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/comments?post=58"}],"version-history":[{"count":6,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/posts\/58\/revisions"}],"predecessor-version":[{"id":714,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/posts\/58\/revisions\/714"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/media\/710"}],"wp:attachment":[{"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/media?parent=58"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/categories?post=58"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/imapmigrator.com\/blog\/wp-json\/wp\/v2\/tags?post=58"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}