{"id":11,"date":"2016-03-17T13:19:55","date_gmt":"2016-03-17T13:19:55","guid":{"rendered":"http:\/\/www.mailsdaddy.com\/blogs\/?p=11"},"modified":"2023-08-06T10:01:07","modified_gmt":"2023-08-06T10:01:07","slug":"how-to-compact-an-offline-folder-ost-file","status":"publish","type":"post","link":"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/","title":{"rendered":"Find Step by Step Solution to Compact OST File in Outlook"},"content":{"rendered":"<p>Using Microsoft Outlook in regular basis can increase the size of your Outlook data files (.pst or .ost). But an extra large PST file would have a negative effect on MS Outlook performance. So to avoid this issue, you can simply <strong>compact an Outlook PST file<\/strong> as well OST files.<!--more--><\/p>\n<p>The compacting OST file actually enables you to use the additional space that is usually available in the Exchange OST file. In this article we will discuss how to reduce size of OST file in Outlook by deleting white spaces.<\/p>\n<blockquote>\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 ' ><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#Are_you_facing_problem_with_corrupt_or_large_OST_files_Dont_worry_here_we\" >Are you facing problem with corrupt or large OST files? Don\u2019t worry here we<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#have_software_to_convert_LargeCorruptOrphanedInaccessible_OST_files_to\" >have software to convert Large\/Corrupt\/Orphaned\/Inaccessible OST files to<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#Outlook_Compatible_PST_format_You_can_try_this_OST_to_PST_Converter_for\" >Outlook Compatible PST format. You can try this\u00a0OST to PST Converter for<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#absolutely_free_which_will_preview_all_data_and_convert_the_first_20\" >absolutely\u00a0free which will preview all data and convert the first 20<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#itemsfolder\" >items\/folder.<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#What_is_White_Space_and_Auto_Compact\" >What is White Space and Auto Compact?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#Solution_to_Compact_an_Offline_Folder_ost_in_MS_Outlook\" >Solution to Compact an Offline Folder (.ost) in MS Outlook<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#How_to_Compact_OST_File_in_Outlook_2003_and_Outlook_2007\" >How to Compact OST File in Outlook 2003 and Outlook 2007?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.mailsdaddy.com\/blogs\/how-to-compact-an-offline-folder-ost-file\/#How_to_Compact_OST_File_in_Outlook_2016_2013_and_Outlook_2010\" >How to Compact OST File in Outlook 2016, 2013 and Outlook 2010?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h4 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"Are_you_facing_problem_with_corrupt_or_large_OST_files_Dont_worry_here_we\"><\/span><span style=\"color: #000000;\"><strong><em><span style=\"font-size: 18px;\">Are you facing problem with corrupt or large OST files? Don\u2019t worry here we <\/span><\/em><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"have_software_to_convert_LargeCorruptOrphanedInaccessible_OST_files_to\"><\/span><span style=\"color: #000000;\"><strong><em><span style=\"font-size: 18px;\">have software to convert Large\/Corrupt\/Orphaned\/Inaccessible OST files to <\/span><\/em><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"Outlook_Compatible_PST_format_You_can_try_this_OST_to_PST_Converter_for\"><\/span><span style=\"color: #000000;\"><strong><em><span style=\"font-size: 18px;\">Outlook Compatible PST format. You can try this\u00a0<a href=\"https:\/\/www.mailsdaddy.com\/ost-to-pst-converter\/\" target=\"_blank\" rel=\"noopener\">OST to PST Converter<\/a> for <\/span><\/em><\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"absolutely_free_which_will_preview_all_data_and_convert_the_first_20\"><\/span><span style=\"color: #000000;\"><strong><em><span style=\"font-size: 18px;\">absolutely\u00a0<\/span><\/em><\/strong><\/span><strong style=\"color: #000000;\"><em><span style=\"font-size: 18px;\">free which will preview all data and convert the first 20 <\/span><\/em><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<h4 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"itemsfolder\"><\/span><strong style=\"color: #000000;\"><em><span style=\"font-size: 18px;\">items\/folder.<\/span><\/em><\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/www.mailsdaddy.com\/dl\/ost-to-pst-converter.zip\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1349\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/download-1.png\" alt=\"download-1\" width=\"211\" height=\"56\" \/><\/a>\u00a0 \u00a0 \u00a0\u00a0<a href=\"https:\/\/www.mailsdaddy.com\/ost-to-pst-converter\/purchase.php\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1350\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/purchase-1.png\" alt=\"purchase-1\" width=\"211\" height=\"56\" \/><\/a><\/p><\/blockquote>\n<h2><span class=\"ez-toc-section\" id=\"What_is_White_Space_and_Auto_Compact\"><\/span>What is White Space and Auto Compact?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You should ensure that any deletion (soft or hard) operation never deletes emails, contacts and other items from your mailbox completely. Such deletion operation just makes your data invisible, thus \u00a0you are just not able to view\/read those items in your mailbox. Generally, when you permanently delete an item, it will turn into this \u201cwhite space\u201d. To stop this from happening, the file contains \u201cwhite space\u201d; Space which can be used by new &amp; modified items.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Solution_to_Compact_an_Offline_Folder_ost_in_MS_Outlook\"><\/span>Solution to Compact an Offline Folder (.ost) in MS Outlook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Microsoft Outlook has inbuilt option \u201c<strong>Compact Now<\/strong> \u201d by using which you can reduce the size of Outlook data files. But when you are using an Exchange account, you require some additional clicks to get to the Compact Now button as shown below:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Compact_OST_File_in_Outlook_2003_and_Outlook_2007\"><\/span>How to Compact OST File in Outlook 2003 and Outlook 2007?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<ol>\n<li>Open the\u00a0<strong>Tools\u00a0<\/strong>menu &gt;&gt; Choose <strong><strong><strong><strong>Account Settings<\/strong><\/strong><\/strong><\/strong><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-12\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/account-setting-outlook-2010-2013.png\" alt=\"account-setting-outlook-2010-2013\" width=\"562\" height=\"251\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/account-setting-outlook-2010-2013.png 562w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/account-setting-outlook-2010-2013-300x134.png 300w\" sizes=\"(max-width: 562px) 100vw, 562px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>Double-click on\u00a0<strong>Microsoft Exchange<\/strong> &gt;&gt; Click on\u00a0<strong><strong><strong><strong>More Settings<\/strong><\/strong><\/strong><\/strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook.png\" alt=\"settings\" width=\"628\" height=\"380\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook.png 628w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook-300x182.png 300w\" sizes=\"(max-width: 628px) 100vw, 628px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>Select the <strong>Advanced tab<\/strong> &gt;&gt; <strong>Offline Folder File<\/strong> Settings\u2026<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook.png\" alt=\"Advance settings\" width=\"350\" height=\"436\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook.png 350w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook-241x300.png 241w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>Finally Click on<strong><strong><strong><strong><strong> Compact Now<\/strong><\/strong><\/strong><\/strong><\/strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost.png\" alt=\"compact ost file in outlook 2013\" width=\"344\" height=\"140\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost.png 344w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost-300x122.png 300w\" sizes=\"(max-width: 344px) 100vw, 344px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Compact_OST_File_in_Outlook_2016_2013_and_Outlook_2010\"><\/span>How to Compact OST File in Outlook 2016, 2013 and Outlook 2010?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<ol>\n<li>Open the\u00a0<strong>File<\/strong>tab &gt;&gt; click on\u00a0<strong>Info<\/strong> &gt;&gt;\u00a0 choose<strong><strong><strong><strong>\u00a0Account Settings.<\/strong><\/strong><\/strong><\/strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-20\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/outlook-2007-account-settings.gif\" alt=\"compact outlook 2007 ost file\" width=\"358\" height=\"307\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>Press double-click on\u00a0<strong>Microsoft Exchange<\/strong> &gt;&gt; and click on\u00a0<strong><strong><strong><strong>More Settings<\/strong><\/strong><\/strong><\/strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-15\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook.png\" alt=\"settings\" width=\"628\" height=\"380\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook.png 628w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/more-settings-outlook-300x182.png 300w\" sizes=\"(max-width: 628px) 100vw, 628px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>Select the <strong>Advanced tab<\/strong> &gt;&gt; <strong>Outlook Data File<\/strong> Settings\u2026<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook.png\" alt=\"Advance settings\" width=\"350\" height=\"436\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook.png 350w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/offline-folder-file-setting-outlook-241x300.png 241w\" sizes=\"(max-width: 350px) 100vw, 350px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<ol>\n<li>At the last, Click on<strong><strong><strong><strong><strong> Compact Now<\/strong><\/strong><\/strong><\/strong><\/strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-13\" src=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost.png\" alt=\"compact ost file in outlook 2013\" width=\"344\" height=\"140\" srcset=\"https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost.png 344w, https:\/\/www.mailsdaddy.com\/blogs\/wp-content\/uploads\/2016\/03\/compact-ost-300x122.png 300w\" sizes=\"(max-width: 344px) 100vw, 344px\" \/><\/li>\n<\/ol>\n<\/ol>\n<p>&nbsp;<\/p>\n<p><strong>Conclusion<\/strong>:\u00a0 The article is discussed about how to compact OST file in Outlook. You can get simple steps to compact and reduce size of OST file for respective Outlook edition. We hope you will get this helpful to solve the related query. You can also make sure <strong><a href=\"https:\/\/www.mailsdaddy.com\/blogs\/what-is-ost-extension-how-to-rebuild-ost-file\/\" target=\"_blank\" rel=\"noopener\">how to create a new OST file in Outlook<\/a><\/strong> by reading another post on the blog.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Using Microsoft Outlook in regular basis can increase the size of your Outlook data files (.pst or .ost). But an extra large PST file would have a negative effect on MS Outlook performance. So to avoid this issue, you can simply compact an Outlook PST file as well OST files.<\/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":[3,2],"tags":[4,6,7,5],"class_list":["post-11","post","type-post","status-publish","format-standard","hentry","category-exchange-server","category-ost-file","tag-compact-ost-file","tag-exchange-server","tag-ms-outlook","tag-reduce-ost-file-size"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Compact an Offline Folder (.ost) in MS Outlook<\/title>\n<meta name=\"description\" content=\"This blog will guide you how to compact OST file in Outlook 2016, 2013, 2010 &amp; 2007. 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