{"id":1316,"date":"2020-12-03T11:23:37","date_gmt":"2020-12-03T11:23:37","guid":{"rendered":"http:\/\/www.mailsdaddy.com\/blogs\/?p=1316"},"modified":"2026-06-10T12:36:32","modified_gmt":"2026-06-10T12:36:32","slug":"fix-outlook-synchronization-error-8004011d-526-80040115-0","status":"publish","type":"post","link":"https:\/\/www.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/","title":{"rendered":"How to fix Outlook Synchronization Error \u2013 8004011d-526-80040115-0?"},"content":{"rendered":"<p class=\"isSelectedEnd\">Microsoft Outlook creates an Offline Storage Table (OST) file that allows users to access mailbox data even when there is no internet connection. The OST file is a synchronized copy of the mailbox data stored on the Microsoft Exchange Server. Any changes made in the OST file while working offline are automatically synchronized with the Exchange Server once the connection is restored.<\/p>\n<p>However, synchronization may sometimes fail due to various reasons, resulting in Outlook errors. One common issue is the Outlook Synchronization Error <strong>8004011d-526-80040115-0<\/strong>. When this error occurs, Outlook cannot properly synchronize with the Exchange mailbox, and users may be unable to access their OST file. Attempting to open the mailbox may display synchronization-related error messages.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey 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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#Causes_of_Outlook_Error_8004011d-526-80040115-0\" >Causes of Outlook Error 8004011d-526-80040115-0<\/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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#Methods_to_Resolve_Outlook_Synchronization_Error_8004011d-526-80040115-0\" >Methods to Resolve Outlook Synchronization Error 8004011d-526-80040115-0<\/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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#1_Verify_Network_Connectivity\" >1. Verify Network Connectivity<\/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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#2_Check_Exchange_Server_Status\" >2. Check Exchange Server Status<\/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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#3_Repair_the_OST_File\" >3. Repair the OST File<\/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.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#4_Create_a_New_Outlook_Profile\" >4. Create a New Outlook Profile<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#5_Use_the_OST_Integrity_Check_Tool\" >5. Use the OST Integrity Check Tool<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#Alternative_Solution_Convert_OST_to_PST\" >Alternative Solution: Convert OST to PST<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/fix-outlook-synchronization-error-8004011d-526-80040115-0\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Causes_of_Outlook_Error_8004011d-526-80040115-0\"><\/span>Causes of Outlook Error 8004011d-526-80040115-0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">Several factors can trigger this synchronization error, including:<\/p>\n<ul data-spread=\"false\">\n<li>Unstable or interrupted network connectivity<\/li>\n<li>Exchange Server downtime or maintenance<\/li>\n<li>Corruption in the OST file<\/li>\n<li>Unexpected power failures<\/li>\n<li>Damaged or misconfigured Outlook profile<\/li>\n<\/ul>\n<p>Whenever you deal with this problem and try to open an OST file then you get the \u201cSync issue\u201d folder showing error logs like this:<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-1317 aligncenter\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2020\/12\/8004011D-526-80040115-0-Copy.jpg\" alt=\"8004011D-526-80040115-0 - Copy\" width=\"566\" height=\"267\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2020\/12\/8004011D-526-80040115-0-Copy.jpg 566w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2020\/12\/8004011D-526-80040115-0-Copy-300x142.jpg 300w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><\/p>\n<p class=\"isSelectedEnd\"><span style=\"font-size: 16px;\">This indicates that Outlook is unable to communicate properly with the Exchange Server due to server-side issues, network problems, or corruption within the local OST file.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Methods_to_Resolve_Outlook_Synchronization_Error_8004011d-526-80040115-0\"><\/span>Methods to Resolve Outlook Synchronization Error 8004011d-526-80040115-0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Verify_Network_Connectivity\"><\/span>1. Verify Network Connectivity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"isSelectedEnd\">Ensure that your internet connection is stable and working properly. A weak or interrupted network connection can prevent Outlook from communicating with the Exchange Server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Check_Exchange_Server_Status\"><\/span>2. Check Exchange Server Status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"isSelectedEnd\">Confirm that the Exchange Server is online and functioning correctly. Synchronization cannot occur if the server is unavailable or experiencing technical issues.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Repair_the_OST_File\"><\/span>3. Repair the OST File<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"isSelectedEnd\">A corrupted OST file can prevent Outlook from accessing mailbox data and completing synchronization tasks. Repairing or rebuilding the OST file may resolve the issue.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Create_a_New_Outlook_Profile\"><\/span>4. Create a New Outlook Profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"isSelectedEnd\">Problems within the Outlook profile can also trigger synchronization errors. Creating a new Outlook profile often helps restore normal mailbox connectivity.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Use_the_OST_Integrity_Check_Tool\"><\/span>5. Use the OST Integrity Check Tool<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"isSelectedEnd\">Microsoft provides an OST Integrity Check utility that can identify and resolve synchronization-related inconsistencies. The tool compares OST data with mailbox data stored on the Exchange Server and attempts to correct detected discrepancies.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Alternative_Solution_Convert_OST_to_PST\"><\/span>Alternative Solution: Convert OST to PST<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"isSelectedEnd\">If the synchronization error persists and the OST file remains inaccessible, converting the OST file to PST format can be an effective solution. PST files can be opened directly in Outlook without requiring a connection to the Exchange Server.<\/p>\n<p class=\"isSelectedEnd\">The <a href=\"https:\/\/apps.microsoft.com\/detail\/xp89934gbzk3g9\" rel=\"nofollow\"><strong>MailsDaddy OST to PST Converter<\/strong><\/a> is designed to recover and convert OST mailbox data while maintaining the original folder hierarchy and mailbox structure. The software supports the extraction of emails, contacts, calendars, tasks, notes, and other mailbox items from inaccessible or damaged OST files.<\/p>\n<p class=\"isSelectedEnd\">Additionally, the tool helps users access valuable mailbox data even when synchronization problems prevent Outlook from opening the OST file.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Outlook Synchronization Error <strong>8004011d-526-80040115-0<\/strong> typically occurs when Outlook cannot properly communicate with the Exchange Server due to network issues, server downtime, OST corruption, or profile-related problems. By checking network connectivity, verifying server availability, repairing the OST file, recreating the Outlook profile, or using the OST Integrity Check tool, users can often resolve the issue. If the OST file remains inaccessible, converting it to PST format with a professional OST conversion tool can help recover and access mailbox data successfully.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft Outlook creates an Offline Storage Table (OST) file that allows users to access mailbox data even when there is no internet connection. The OST file is a synchronized copy of the mailbox data stored on the Microsoft Exchange Server. Any changes made in the OST file while working offline are automatically synchronized with the [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":5501,"comment_status":"closed","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-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":"","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-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":"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":""},"mobile":{"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":""}},"footnotes":""},"categories":[173,320],"tags":[362,361,363],"class_list":["post-1316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook","category-outlook-error","tag-fix-outlook-synchronization-error-8004011d-526-80040115-0","tag-how-to-fix-outlook-synchronization-error-8004011d-526-80040115-0","tag-outlook-synchronization-error-8004011d-526-80040115-0"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix Outlook Synchronization Error \u2013 8004011d-526-80040115-0<\/title>\n<meta name=\"description\" content=\"Solved Outlook Synchronization Error \u2013 8004011d-526-80040115-0? 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