{"id":13073,"date":"2026-02-27T09:50:04","date_gmt":"2026-02-27T09:50:04","guid":{"rendered":"https:\/\/www.cigatisolutions.com\/blog\/?p=13073"},"modified":"2026-02-27T09:50:06","modified_gmt":"2026-02-27T09:50:06","slug":"rename-ost-file-in-outlook","status":"publish","type":"post","link":"https:\/\/www.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/","title":{"rendered":"How to Rename OST File in Outlook? Verified Solution"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;13073&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;How to Rename OST File in Outlook? Verified Solution&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n\n<p>In technical terms, users resolve synchronization bottlenecks and data corruption by renaming the OST file. As soon as the Outlook starts acting up, the user rename OST file in Outlook. After changing the OST filename, one can hide the problematic file and download an uncorrupted copy of the mailbox. Users improve the organization and enhance security by renaming the OST file. This blog post walks you through several methods for renaming the OST file in Outlook.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-light-blue 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.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Why_Change_the_OST_File_Name\" >Why Change the OST File Name?<\/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.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Learn_How_to_Rename_OST_File_in_Microsoft_Outlook\" >Learn How to Rename OST File in Microsoft Outlook<\/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.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Solution_01_Using_File_Explorer\" >Solution 01: Using File Explorer<\/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.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Solution_02_Create_a_New_Outlook_Profile\" >Solution 02: 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-5\" href=\"https:\/\/www.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Solution_03_Via_Account_Settings\" >Solution 03: Via Account Settings&nbsp;<\/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.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Renamed_OST_File_Doesnt_Help_Use_a_Specialized_Tool_to_Recover_the_OST_File\" >Renamed OST File Doesn\u2019t Help? Use a Specialized Tool to Recover the OST File<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Change_the_OST_File_Name\"><\/span>Why Change the OST File Name?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>One of the reasons to change the OST file name is to prevent the confusion caused by Outlook\u2019s default naming system. There are other reasons too that are listed below:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If the user handles many email accounts, renaming the OST file helps better organize them and locate them easily.<\/li>\n\n\n\n<li>A custom file name reduces the confusion of selecting the wrong OST file while transferring the data.<\/li>\n\n\n\n<li>Often, users change the OST file name during profile migration to help avoid duplication issues.<\/li>\n\n\n\n<li>By updating the OST file name, users can repair the damaged or unsynced data files as a troubleshooting step.<\/li>\n\n\n\n<li>Businesses rename the OST files to match them with their company&#8217;s internal naming standards.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Learn_How_to_Rename_OST_File_in_Microsoft_Outlook\"><\/span>Learn How to Rename OST File in Microsoft Outlook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Now, after understanding the reasons behind renaming the OST file in Outlook, let\u2019s move ahead. In this section, we will implement various solutions to rename the Outlook OST file.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_01_Using_File_Explorer\"><\/span>Solution 01: Using File Explorer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>It is a simple manual solution to rename the OST file in MS Outlook. Users need to first locate the OST file and then change its file name.&nbsp;<\/p>\n\n\n\n<p>The following are the steps to start renaming the OST file:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>First, ensure that<strong> Outlook<\/strong> is completely<strong> closed<\/strong>. Check through <strong>Task Manager<\/strong> also.<\/li>\n\n\n\n<li>Now, press <strong>Windows+R<\/strong>, type: <strong>%localappdata%\\Microsoft\\Outlook <\/strong>and hit <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Next, <strong>locate<\/strong> the <strong>OST file<\/strong> that is named after your email address.<\/li>\n\n\n\n<li><strong>Right-click<\/strong> on it, select <strong>Rename<\/strong>, and change the file name. Then, press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>Re-open <strong>MS Outlook<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p><strong>Limitations<\/strong>: This approach will generate a new OST file of the same renamed one. If your OST file is corrupted, users will not be able to rename it.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_02_Create_a_New_Outlook_Profile\"><\/span>Solution 02: Create a New Outlook Profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>By setting up a new Outlook profile, Outlook will recreate Outlook OST file that is linked to your profile. This approach corrects issues related to file corruption, sync errors, and file conflicts.&nbsp;<\/p>\n\n\n\n<p>Use the following instructions to initiate creating a new Outlook profile:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Close the <strong>MS Outlook<\/strong> application.<\/li>\n\n\n\n<li>Then, press <strong>Windows+R<\/strong>, type:<strong> control<\/strong> and hit <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>After that, go to <strong>Mail <\/strong>and choose <strong>Show Profiles<\/strong>.<\/li>\n\n\n\n<li>Next, click on <strong>Add<\/strong>, enter the profile name, and press <strong>Ok<\/strong>.<\/li>\n\n\n\n<li>Now, enter the <strong>account credentials<\/strong> and complete the on-screen setup.<\/li>\n\n\n\n<li>In the <strong>Always use this profile<\/strong>, choose the new profile and click <strong>Apply <\/strong>&gt; <strong>Ok<\/strong>.<\/li>\n\n\n\n<li>In the end, <strong>restart Outlook.<\/strong>&nbsp;<\/li>\n<\/ol>\n\n\n\n<p><strong>Limitations<\/strong>: Users need to set up the customized settings again. This method does not rename the OST file but creates a new OST file.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_03_Via_Account_Settings\"><\/span>Solution 03: Via Account Settings&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This solution involves users first finding the exact location of their OST file in the Account Settings and then renaming it. It is suitable for those users having multiple OST files on their system.&nbsp;<\/p>\n\n\n\n<p>Look at the steps to rebuild OST file:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open <strong>Microsoft Outlook<\/strong> on your system.<\/li>\n\n\n\n<li>Then, <strong>locate<\/strong> the <strong>OST<\/strong> file that you want to rename.<\/li>\n\n\n\n<li>Next, navigate to <strong>File<\/strong> &gt; <strong>Account Settings<\/strong> &gt; <strong>Account Settings<\/strong>.<\/li>\n\n\n\n<li>In the <strong>Data Files<\/strong> tab, select the <strong>email ID,<\/strong> and click <strong>Open File Location<\/strong>.<\/li>\n\n\n\n<li>Now,<strong> exit<\/strong> <strong>Outlook<\/strong> and in the opened folder, <strong>right-click<\/strong> on the<strong> OST<\/strong> file.<\/li>\n\n\n\n<li>Choose<strong> Rename<\/strong>, type in the new name, and press<strong> Enter<\/strong>.<\/li>\n\n\n\n<li>Close and re-open Outlook.&nbsp;<\/li>\n<\/ol>\n\n\n\n<p><strong>Limitations<\/strong>: This process will not rename the corrupted OST file. If the new OST file is created, the syncing process will take a considerable amount of time.<\/p>\n\n\n\n<p>Sometimes, renaming the OST file doesn\u2019t help. It can be due to several reasons. In such a situation, it is best to recover the OST file first and then rename it. In the next section, we will look at a solution that recovers the damaged OST file.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Renamed_OST_File_Doesnt_Help_Use_a_Specialized_Tool_to_Recover_the_OST_File\"><\/span>Renamed OST File Doesn\u2019t Help? Use a Specialized Tool to Recover the OST File<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Although renaming an OST file is a simple process, it may not address the existing file problems. It is recommended to resolve the issue and then rename OST file in Outlook. A specialized software, the <strong>Cigati <a href=\"https:\/\/www.cigatisolutions.com\/ost-file-recovery-tool\/\">OST File Recovery<\/a><\/strong>, is used to recover all the OST data safely. This tool recovers the data and allows users to save it in different formats. Moreover, it offers different modes of corruption: Standard, Advanced, and Deep. Also, the tool can target emails from specific time periods.<\/p>\n\n\n<div class=\"row justify-content-center mac-win-tab mt-3 mb-5\">\n<div class=\"col-md-6\">\n<div id=\"home\" class=\"tab-pane fade active show\" role=\"tabpanel\" aria-labelledby=\"home-tab\"><span class=\"block_btn\"><a class=\"primary-btn\" href=\"https:\/\/www.cigatisolutions.com\/demo-version\/Cigati-OST-File-Recovery-Demo.exe\"><i class=\"icon-windows\"><\/i> Download Now<\/a>&nbsp;&nbsp;<a class=\"secondary-btn\" href=\"https:\/\/www.cigatisolutions.com\/ost-file-recovery-tool\/purchase-now.html\"><i class=\"icon-basket\"><\/i> Purchase Now<\/a><\/span><\/div>\n<\/div>\n<\/div>\n\n\n<p><strong>Simple steps to recreate Outlook OST file:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Download and install the recovery tool on your PC.<\/li>\n\n\n\n<li>Then, click on the <strong>Open<\/strong> button to browse and add the OST file.<\/li>\n\n\n\n<li>Now, select the <strong>recovery mode:<\/strong> Standard, Advanced, and Deep.<\/li>\n\n\n\n<li>After that, check and select the <strong>OST file<\/strong> details.<\/li>\n\n\n\n<li>Finally, tap on the<strong> Ok<\/strong> button to start the recovery process.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>The synchronization error can be rectified by renaming the OST file in Outlook. In this technical article, we have shared multiple solutions to rename OST file in Outlook. The manual solutions do not guarantee data integrity, but work well. On the other hand, if the OST file is corrupted, first recover it using the <strong>Cigati OST File Recovery Tool<\/strong>. This tool recovers the damaged OST file data while preserving all the email data.<\/p>\n\n\n\n<p><strong>You May Also Read:<\/strong> <a href=\"https:\/\/www.cigatisolutions.com\/blog\/change-outlook-data-file-location\/\">Change Outlook OST File Location<\/a><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1772185186281\"><strong class=\"schema-faq-question\">Q: Why would I need to rename an OST file in Outlook?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> There are several reasons to rename an OST file: to improve file management, to help troubleshoot a syncing issue, or to resolve conflicts between profiles; however, this does not necessarily mean that it will help you with a corruption or a sync issue.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1772185200013\"><strong class=\"schema-faq-question\">Q: Can I rename an OST file while Outlook is running?<\/strong> <p class=\"schema-faq-answer\"><strong>Ans:<\/strong> No, if you would like to rename an OST file, you need to close Outlook completely before doing so. If you are running Outlook, the OST file will be locked, which means that you cannot rename it.<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>In technical terms, users resolve synchronization bottlenecks and data corruption by renaming the OST file. As soon as the Outlook<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.cigatisolutions.com\/blog\/rename-ost-file-in-outlook\/\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":13075,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-13073","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook-error"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Rename OST File in Outlook? 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