{"id":99,"date":"2016-09-17T18:36:15","date_gmt":"2016-09-17T18:36:15","guid":{"rendered":"http:\/\/www.mailsdaddy.com\/blogs\/?p=99"},"modified":"2023-08-06T10:01:02","modified_gmt":"2023-08-06T10:01:02","slug":"fix-hotmail-ost-is-not-an-outlook-data-file","status":"publish","type":"post","link":"https:\/\/www.mailsdaddy.com\/blogs\/fix-hotmail-ost-is-not-an-outlook-data-file\/","title":{"rendered":"Best Three Methods to Fix Hotmail.ost is Not an Outlook Data File Error"},"content":{"rendered":"<p>This blog is mainly posted to provide effective solutions to fix very common errors \u201cHotmail.ost is not an Outlook data file\u201c of Microsoft Outlook. <!--more-->But direct discussing solutions will be incomplete information. So I am going to tell some basic informations before introducing solutions to fix \u201cHotmail.ost cannot accessed\u201d error.<\/p>\n<p>When you configure a Hotmail account in MS Outlook that time an additional plugin \u201cMicrosoft Outlook Hotmail Connector\u201d is required. Once you configure a Hotmail account, MS outlook creates an .ost file to save emails, contacts, notes and calendar items etc. The user can use this OST file to read items even when internet connection is not available.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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-hotmail-ost-is-not-an-outlook-data-file\/#Why_Microsoft_Outlook_Produces_Hotmailost_is_not_an_Outlook_data_file_Error\" >Why Microsoft Outlook Produces Hotmail.ost is not an Outlook data file Error?<\/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-hotmail-ost-is-not-an-outlook-data-file\/#Method_1-_Fix_Error_hotmailost_is_not_an_outlook_data_file\" >Method: 1- Fix Error hotmail.ost is not an outlook data file<\/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-hotmail-ost-is-not-an-outlook-data-file\/#Method_2-_Fix_Error_Hotmailost_is_not_an_offline_folder\" >Method: 2- Fix Error Hotmail.ost is not an offline folder<\/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-hotmail-ost-is-not-an-outlook-data-file\/#Method_3_Fix_Error_Hotmailost_is_not_an_Outlook_data_file_by_converting_file_to_pst_format\" >Method: 3 Fix Error Hotmail.ost is not an Outlook data file by converting file to pst format<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/fix-hotmail-ost-is-not-an-outlook-data-file\/#Conclusion\" >Conclusion:<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_Microsoft_Outlook_Produces_Hotmailost_is_not_an_Outlook_data_file_Error\"><\/span>Why Microsoft Outlook Produces Hotmail.ost is not an Outlook data file Error?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The OST files created by MS Outlook for Hotmail account works fine until you don\u2019t delete profile or uninstall MS Outlook. But when you reinstall Microsoft Outlook or delete your profile that time OST file gets inaccessible and produces very common errors such as:<\/p>\n<ul>\n<li>ost is not an outlook data file<\/li>\n<li>ost is not an offline folder<\/li>\n<li>ost cannot be accessed<\/li>\n<li>ost cannot be opened<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Method_1-_Fix_Error_hotmailost_is_not_an_outlook_data_file\"><\/span>Method: 1- Fix Error hotmail.ost is not an outlook data file<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This method is very helpful to get rid from Hotmail.ost is not an offline folder or Hotmail.ost cannot be opened. So just follow the steps:<\/p>\n<ol>\n<li>In the very first step, delete the Hotmail account.<\/li>\n<li>Uninstall the Outlook Hotmail Connector and Close Outlook..<\/li>\n<li>Delete the OST file created by MS Outlook.<\/li>\n<li>Now reinstall the Outlook Hotmail Connector.<\/li>\n<li>Configure same Hotmail account with a new profile and Outlook will create a new OST file.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Method_2-_Fix_Error_Hotmailost_is_not_an_offline_folder\"><\/span>Method: 2- Fix Error Hotmail.ost is not an offline folder<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>This is another good solution already suggested by many Microsoft MVPs for the same query. So Check if Outlook is running in compatibility mode. Follow the steps:<\/p>\n<ol>\n<li>Go to Computer &gt;&gt; C Drive &gt;&gt; Program Files. (For 64bit OS: Program Files (x86))<\/li>\n<li>Go Microsoft Office &gt;&gt; Office 14.<\/li>\n<li>Right click on Outlook.exe (application) &gt;&gt; properties.<\/li>\n<li>Under Compatibility tab &gt;&gt; uncheck the compatibility mode &gt;&gt; OK.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Method_3_Fix_Error_Hotmailost_is_not_an_Outlook_data_file_by_converting_file_to_pst_format\"><\/span>Method: 3 Fix Error Hotmail.ost is not an Outlook data file by converting file to pst format<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If the above both methods do not help, then go with this most effective method. By using this reliable method you can fix these errors and access all precious mail with Outlook 2016, 2013, 2010 and 2007 etc.<\/p>\n<ol>\n<li><strong>Download<\/strong> and install free demo of the tool: <a href=\"http:\/\/www.mailsdaddy.com\/ost-to-pst-converter\/\">http:\/\/www.mailsdaddy.com\/ost-to-pst-converter\/<\/a><\/li>\n<li><strong>Add<\/strong> an OST file which you want to convert. The tool will load and preview all items.<\/li>\n<li>Click on the <strong>Export<\/strong> button, choose reliable options and finally click <strong>Export<\/strong><\/li>\n<\/ol>\n<h4><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>You can examine these three methods to fix Outlook errors like: Hotmail.ost is not an Outlook data file or Hotmail.ost cannot be opened. The last method is very powerful and works in all conditions even if OST file is corrupted or orphaned. So I will recommend you to use this simple method to regain data from inaccessible OST files. You can also check <a href=\"http:\/\/www.mailsdaddy.com\/blogs\/how-to-open-import-pst-file-outlook\/\">how to import\/open PST file in MS Outlook<\/a> in another post.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This blog is mainly posted to provide effective solutions to fix very common errors \u201cHotmail.ost is not an Outlook data file\u201c of Microsoft Outlook.<\/p>\n","protected":false},"author":1,"featured_media":0,"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":"","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-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":[3,11,2,12],"tags":[],"class_list":["post-99","post","type-post","status-publish","format-standard","hentry","category-exchange-server","category-microsoft-outlook","category-ost-file","category-pst-file"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix Hotmail.ost is Not an Outlook Data File cannot be opened<\/title>\n<meta name=\"description\" content=\"Fix error Hotmail.ost is not an Outlook data file or Hotmail.ost cannot be accessed. 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