{"id":11267,"date":"2025-09-30T09:33:15","date_gmt":"2025-09-30T09:33:15","guid":{"rendered":"https:\/\/www.adviksoft.com\/blog\/?p=11267"},"modified":"2025-10-22T10:15:47","modified_gmt":"2025-10-22T10:15:47","slug":"import-ost-to-outlook-2021","status":"publish","type":"post","link":"https:\/\/www.adviksoft.com\/blog\/import-ost-to-outlook-2021\/","title":{"rendered":"How to Import OST to Outlook?"},"content":{"rendered":"<p>Microsoft Outlook stores mailbox data in two file formats \u2013 OST (Offline Storage Table) and PST (Personal Storage Table). OST files are used when you work offline, and they sync with the server once you reconnect. However, there are time when you need to import OST to Outlook. But here\u2019s the catch: <strong>Outlook does not allow you to directly import OST files<\/strong>.<\/p>\n<p>OST files are linked to a specific Outlook profile and Exchange server. Once disconnected, they can\u2019t be added back into Outlook directly. This becomes a problem when you want to access emails from an orphaned, corrupted, or old OST file.<\/p>\n<p>To attach OST file to Outlook, you either need:<\/p>\n<ul>\n<li>A manual workaround (if Outlook is still active).<\/li>\n<li>Or convert OST into PST, which Outlook supports<\/li>\n<\/ul>\n<p>In this guide, we\u2019ll explain\u00a0the reasons, manual method, and an automated solution to open OST file in Outlook.<\/p>\n<h2>Why Do You Need to Import OST to Outlook?<\/h2>\n<p>Here are some common scenarios that requires importing OST file to Outlook.<\/p>\n<ul>\n<li>If you&#8217;ve lost access to your Exchange or IMAP account.<\/li>\n<li>To recover emails from an orphaned OST file.<\/li>\n<li>To move OST data to a new Outlook profile.<\/li>\n<\/ul>\n<p>Let&#8217;s start the process without any further delay!<\/p>\n<h2>How to Add OST File to Outlook Manually?<\/h2>\n<p>If you still have access to Outlook and the account connected to your OST file, you can import .ost file into Outlook via an IMAP-based account.<\/p>\n<ol>\n<li>Create a Gmail or Yahoo Mail account and enable IMAP.<\/li>\n<li>Add this account to Outlook.<\/li>\n<li>Drag and drop OST emails into the IMAP folders in Outlook.<\/li>\n<li>Let Outlook sync data with the mail server.<\/li>\n<li>Now, set up the same IMAP account in another Outlook.<\/li>\n<li>Once synced, your emails are accessible there.<\/li>\n<\/ol>\n<p><em>In this way, Outlook import OST file.<\/em><\/p>\n<blockquote><p><strong>Limitations:<\/strong><\/p>\n<ul>\n<li>Doesn\u2019t work with orphaned or corrupted OST files.<\/li>\n<li>Requires Outlook + IMAP setup.<\/li>\n<li>Time-consuming, especially with large mailboxes.<\/li>\n<li>Doesn\u2019t fully export contacts, calendars, or attachments.<\/li>\n<\/ul>\n<\/blockquote>\n<h2>How to Import OST File into Outlook Securely?<\/h2>\n<p>To avoid the above limitations, using <strong>Advik <a href=\"https:\/\/www.adviksoft.com\/ost\/converter.html\">OST Converter<\/a><\/strong> is recommended. It allows you to convert multiple OST files into PST format for Outlook while keeping the folder structure intact. You can also import orphaned, inaccessible, or corrupted OST files without any issues. All email properties remain unchanged, ensuring no data loss. Plus, there are no size restrictions; you can <a href=\"https:\/\/www.adviksoft.com\/ost\/pst.html\">convert OST to PST<\/a> file of any size.<\/p>\n<p>Click on the free download button and check how it works;<\/p>\n<p><a href=\"https:\/\/www.adviksoft.com\/dl\/advik-outlook-ost-converter.exe\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-181\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2018\/05\/Download-Button-e1525685682329.png\" alt=\"\" width=\"213\" height=\"55\" \/><\/a>\u00a0 \u00a0 <a href=\"https:\/\/www.adviksoft.com\/buy\/ost\/converter.html\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-620\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2018\/05\/buy-now-button.png\" alt=\"\" width=\"190\" height=\"75\" \/><\/a><\/p>\n<h3>Steps to Import OST to Outlook<\/h3>\n<p><strong>Step 1.<\/strong> Run the software and read the instructions carefully.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11291 \" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/outlook-2.jpg\" alt=\"Import OST to Outlook 2021\" width=\"692\" height=\"581\" \/><\/p>\n<p><strong>Step 2.<\/strong> Click <strong>Select Files<\/strong> or <strong>Select Folder<\/strong> &amp; add .ost files.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11290\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/set-up-auto-reply-in-outlook-617011583e6bc-1634734424-2.jpg\" alt=\"Click Select Files or Select Folder\" width=\"691\" height=\"580\" \/><\/p>\n<p><strong>Step 3.<\/strong> Select those folders that you want to import into Outlook.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11278\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/repair-outlook-pst-file-8.jpg\" alt=\"select required folders \" width=\"688\" height=\"582\" \/><\/p>\n<p><strong>Step 4.<\/strong> Select <strong>PST<\/strong> as a saving option from the list.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11277\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/repair-outlook-pst-file-9.jpg\" alt=\"Select PST as a saving option\" width=\"685\" height=\"579\" \/><\/p>\n<p><strong>Step 5.<\/strong> Choose the <strong>destination path<\/strong> &amp; click on the <strong>Next<\/strong> button.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11275\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/repair-outlook-pst-file-6.jpg\" alt=\"add ost file to Outlook\" width=\"684\" height=\"578\" \/><\/p>\n<p><strong>Step 6. <\/strong>Now, open Outlook and click <strong>File<\/strong> menu &gt;&gt; <strong>Open &amp; Export<\/strong> &gt;&gt; <strong>Import\/Export<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-11293\" src=\"https:\/\/www.adviksoft.com\/blog\/wp-content\/uploads\/2022\/04\/step2-1-1.png\" alt=\"Import OST to Outlook\" width=\"500\" height=\"423\" \/><\/p>\n<h3>Watch How to Open OST File in Outlook<\/h3>\n<div class=\"video-container\"><iframe class=\"loading-lazy\" title=\"YouTube video player\" src=\"https:\/\/www.adviksoft.com\/img4\/play.png\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-src=\"https:\/\/www.youtube.com\/embed\/OPMPuOyPOoE\"><span data-mce-type=\"bookmark\" style=\"display: inline-block; width: 0px; overflow: hidden; line-height: 0;\" class=\"mce_SELRES_start\"><\/span><\/iframe><\/div>\n<div class=\"red-border\">\n<h3>Why Should You Choose Automated Software?<\/h3>\n<p>If your OST file is orphaned, corrupted, or no longer linked with Outlook, manual methods won\u2019t help. In such cases, using a dedicated OST to PST converter tool can save time and prevent data loss. Here are some key benefits:<\/p>\n<ul>\n<li>You don\u2019t need an active Outlook profile or server connection to open your OST file.<\/li>\n<li>Emails, attachments, contacts, calendar, and folder hierarchy remain intact during conversion.<\/li>\n<li>Even if your OST file is damaged or disconnected from Exchange, you can still retrieve the data.<\/li>\n<li>Convert multiple OST files at once instead of repeating the process manually for each file.<\/li>\n<li>Apply filters (by date, folder, or item type) to move only the data you actually need.<\/li>\n<li>Access data from encrypted OST files without the original password.<\/li>\n<li>Save OST data in different formats like <a href=\"https:\/\/www.adviksoft.com\/ost\/eml.html\">OST to EML<\/a>, MBOX, MSG, and PDF.<\/li>\n<li>Works with all versions of Outlook, including 2021, 2019, 2016, and older.<\/li>\n<\/ul>\n<\/div>\n<p>This approach gives you flexibility, ensures no data loss, and simplifies the process compared to time-consuming manual work.<\/p>\n<h3>Conclusion<\/h3>\n<p>You cannot import OST to Outlook directly. If the OST is still linked to your Outlook profile, you can use the IMAP method. But if your OST is orphaned, corrupted, or inaccessible, the only reliable way is to convert OST to PST first and then import it into Outlook.<\/p>\n<p>Choose the method that fits your situation:<\/p>\n<ul>\n<li>IMAP method \u2192 for active Outlook profiles.<\/li>\n<li>OST to PST conversion \u2192 for orphaned or inaccessible OST files.<\/li>\n<\/ul>\n<div class=\"black-border\">\n<h4>FAQs \u2013 Import OST file into Outlook<\/h4>\n<p><strong>Q1. Why can\u2019t I directly import OST to Outlook?<\/strong><\/p>\n<p><strong>Ans.<\/strong> Because OST files are linked to a specific Outlook profile\/Exchange account.<\/p>\n<p><strong>Q2. How can I open an orphaned OST file?<\/strong><\/p>\n<p><strong>Ans. <\/strong>You need to convert it into PST format and then import it into Outlook.<\/p>\n<p><strong>Q3. Will the manual method recover contacts and calendar, too?<\/strong><\/p>\n<p><strong>Ans. <\/strong>No, manual method mainly transfers emails, not all items.<\/p>\n<p><strong>Q4. Which method is best for non-technical users?<\/strong><\/p>\n<p><strong>Ans. <\/strong>Converting OST to PST is the easiest and most reliable method.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft Outlook stores mailbox data in two file formats \u2013 OST (Offline Storage Table) and PST (Personal Storage Table). OST files are used when you work offline, and they sync with the server once you reconnect. However, there are time when you need to import OST to Outlook. But here\u2019s the catch: Outlook does not [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":11340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46,2],"tags":[],"class_list":["post-11267","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-conversion","category-outlook"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Import OST to Outlook ? Step-by-Step Guide<\/title>\n<meta name=\"description\" content=\"Learn how to import OST to Outlook using manual and automated methods. 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