{"id":1396,"date":"2023-08-11T13:04:24","date_gmt":"2023-08-11T13:04:24","guid":{"rendered":"https:\/\/www.trustvare.com\/blog\/?p=1396"},"modified":"2023-08-14T09:46:55","modified_gmt":"2023-08-14T09:46:55","slug":"fix-username-ost-is-in-use-cant-be-accessed","status":"publish","type":"post","link":"https:\/\/www.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/","title":{"rendered":"How Do I Fix- &#8220;Username .ost is in Use &#038; Can&#8217;t be Accessed?"},"content":{"rendered":"<p>Open Outlook OST File is in Use and Cannot Be Accessed. Is the problem you face? Do you know MS Outlook integration with MS Exchange Server when users want to work offline? OST file is created which is an exact copy of the Exchange Server data. The data is created in the Cached Exchange mode in your Outlook account.<\/p>\n<p>When you work with Outlook, the problem can be common. Outlook displays inaccessible Outlook with the error message:<\/p>\n<blockquote><p><strong><em>\u201cC:\\Users\\user name\\AppData\\Local\\Microsoft\\user name\\username.ost is in use and cannot be accessed<\/em><\/strong><strong>.\u201d<\/strong><\/p><\/blockquote>\n<p>In this situation, turn off the applications using this file and then access the file. The article provides you reasons and solutions to fix the \u201cOutlook OST is in use and cannot be accessed\u201d error.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Common_Reasons_for_the_Error_%E2%80%93_%E2%80%9CUsername_OST_Is_In_Use_Cant_Be_Accessed%E2%80%9D\" >Common Reasons for the Error &#8211; &#8220;Username .OST Is In Use &amp; Can&#8217;t Be Accessed&#8221;<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Solutions_for_%E2%80%9CUnable_to_Open_Outlook_OST_File_is_in_Use_and_Cannot_Be_Accessed_Error%E2%80%9D\" >Solutions for \u201cUnable to Open Outlook OST File is in Use and Cannot Be Accessed Error\u201d<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Method_1-_Terminate_All_The_Processes_Associated_with_Outlook\" >Method 1- Terminate All The Processes Associated with Outlook<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Method_2-_Uncheck_the_Cached_Exchange_Mode_option\" >Method 2- Uncheck the Cached Exchange Mode option<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Method_3-_Taking_Help_of_the_ScanOSTexe_Repair_inbuilt_Tool\" >Method 3- Taking Help of the ScanOST.exe Repair inbuilt Tool<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Method_4-_Convert_OST_to_Reliable_file_format\" >Method 4- Convert OST to Reliable file format<\/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.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#1_Using_the_ImportExport_Feature-_An_Inbuilt_Feature_of_MS_Outlook\" >1). Using the Import\/Export Feature- An Inbuilt Feature of MS Outlook<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Common_Reasons_for_the_Error_%E2%80%93_%E2%80%9CUsername_OST_Is_In_Use_Cant_Be_Accessed%E2%80%9D\"><\/span>Common Reasons for the Error &#8211; &#8220;Username .OST Is In Use &amp; Can&#8217;t Be Accessed&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Here are reasons that often lead to the <a href=\"https:\/\/www.trustvare.com\/blog\/open-inaccessible-encrypted-ost-file\/\">inaccessible OST file<\/a> error.<\/p>\n<ol>\n<li>There may be synchronization issues with the local OST files and Exchange Server Mailbox.<\/li>\n<li>Don\u2019t forget to check the internet connection. Instability in the connection can lead the problem.<\/li>\n<li>There may be multiple users who are trying to access the same OST files.<\/li>\n<li>Check the conflict of Outlook with other tools in your system.<\/li>\n<li>Improper shutdown of your system can cause the problem.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Solutions_for_%E2%80%9CUnable_to_Open_Outlook_OST_File_is_in_Use_and_Cannot_Be_Accessed_Error%E2%80%9D\"><\/span>Solutions for \u201cUnable to Open Outlook OST File is in Use and Cannot Be Accessed Error\u201d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We explain solution to solves this errors like manual and automated, Lets discuss about it&#8217;s process.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Method_1-_Terminate_All_The_Processes_Associated_with_Outlook\"><\/span>Method 1- Terminate All The Processes Associated with Outlook<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can fix the problem if you terminate all the processes associated with Outlook. Here is the simple step you can follow for this.<\/p>\n<ul>\n<li>Open the Task Manager or click \u201cCTRL+ALT+Delete\u201d &amp; select Task Manager.<\/li>\n<li>Click on the Process tab and locate the entire processes with the name Communicator, Lync, ucmapi, or Outlook. Select them and hit the \u2018End Task\u2019 option to terminate all the processes linked with Outlook for Windows.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Method_2-_Uncheck_the_Cached_Exchange_Mode_option\"><\/span>Method 2- Uncheck the Cached Exchange Mode option<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In the next phase, all you need to do is to inactivate the cached Exchange Mode by following these easy steps:<\/p>\n<ol>\n<li>Exit from MS Outlook<\/li>\n<li>Navigate the\u00a0<strong>Start menu<\/strong>\u00a0&gt;&gt;\u00a0<strong>Control panel<\/strong>\u00a0and Select\u00a0<strong>Mail<\/strong><\/li>\n<li>Hit\u00a0<strong>Email Accounts<\/strong>\u00a0and locate the\u00a0<strong>Email<\/strong>\u00a0option<\/li>\n<li>Choose the email account linked to the accessible OST file displaying the error and now press the\u00a0<strong>\u2018Change\u2019 tab<\/strong><\/li>\n<li>Here, uncheck the\u00a0<strong>\u2018Use Cached Exchange Mode\u2019<\/strong>\u00a0option to deactivate it<\/li>\n<li>Select Next and click on\u00a0<strong>\u2018Finish\u2019<\/strong><\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Method_3-_Taking_Help_of_the_ScanOSTexe_Repair_inbuilt_Tool\"><\/span>Method 3- Taking Help of the ScanOST.exe Repair inbuilt Tool<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Outlook offers the inbuilt utility scanost.exe to repair PST and OST files. It has now replaced by scanpst.exe to fix small issues with OST and PST files. The utility can be beneficial. However, the problem remains the same if the damage with OST and PST files become severe. In this case, you can use a third party repairing application. Here are the steps to follow.<\/p>\n<ul>\n<li>Shut down the\u00a0<strong>MS Outlook<\/strong>\u00a0application<\/li>\n<li>Start the\u00a0<strong>Scanost.exe<\/strong>\u00a0 if you have Outlook 2010 or below versions or else start the scanpst.exe<\/li>\n<li>Open the tool.<\/li>\n<li>Enter the Username of the OST file you are facing the problem<\/li>\n<li>Hit\u00a0<strong>\u2018Connect\u2019<\/strong>\u00a0while asking for work offline or Connect<\/li>\n<li>Select all folders or selective ones and check the box\u00a0<strong>\u2018Repair Errors\u2019<\/strong><\/li>\n<li>Hit the\u00a0<strong>\u2018Begin Scan\u2019<\/strong>\u00a0button for repairing<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Method_4-_Convert_OST_to_Reliable_file_format\"><\/span>Method 4- Convert OST to Reliable file format<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>OST files are prone to corruption. On the other hand, PST is the smart alternative to work with Outlook without Exchange Server. If you want to move OST to reliable format, you have two ways to consider- Import\/ Export Option or third party tool.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"1_Using_the_ImportExport_Feature-_An_Inbuilt_Feature_of_MS_Outlook\"><\/span>1). Using the Import\/Export Feature- An Inbuilt Feature of MS Outlook<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>Open <strong>MS Outlook Application.\u00a0<\/strong><\/li>\n<li>Navigate the File menu, move cursor on the \u2018<strong>Open &amp; Export\u2019 option<\/strong>\u00a0&amp; then choose \u2018<strong>Import and Export\u2019<\/strong>.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1398 size-full\" src=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-1.png\" alt=\"Open Outlook OST File\" width=\"515\" height=\"409\" srcset=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-1.png 515w, https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-1-300x238.png 300w\" sizes=\"auto, (max-width: 515px) 100vw, 515px\" \/><\/p>\n<ul>\n<li>From the Import and Export Wizard, select the Export to a file option and click \u2018<strong>Next\u2019.<\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1399 size-full aligncenter\" src=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-2.png\" alt=\"Open Outlook OST File\" width=\"452\" height=\"350\" srcset=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-2.png 452w, https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-2-300x232.png 300w\" sizes=\"auto, (max-width: 452px) 100vw, 452px\" \/><\/p>\n<ul>\n<li>From the Export to a File option, choose the <strong>\u2018Outlook Data File (.pst)\u2019 option<\/strong>\u00a0&amp; hit\u00a0<strong>Next.<\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-1400 size-full aligncenter\" src=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-3.png\" alt=\"Open Outlook OST File\" width=\"447\" height=\"345\" srcset=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-3.png 447w, https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-3-300x232.png 300w\" sizes=\"auto, (max-width: 447px) 100vw, 447px\" \/><\/p>\n<ul>\n<li>Select the<strong>\u00a0folder<\/strong>\u00a0from where you want to import data and press Next<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1401 size-full\" src=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-4.png\" alt=\"Open Outlook OST File\" width=\"449\" height=\"342\" srcset=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-4.png 449w, https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-4-300x229.png 300w\" sizes=\"auto, (max-width: 449px) 100vw, 449px\" \/><\/p>\n<ul>\n<li>Now, enter the <strong>destination<\/strong>\u00a0folder to save the newly created PST file, select any given option and then\u00a0<strong>\u2018Finish\u2019<\/strong><\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1402 size-full\" src=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-5.png\" alt=\"Open Outlook OST File\" width=\"443\" height=\"345\" srcset=\"https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-5.png 443w, https:\/\/www.trustvare.com\/blog\/wp-content\/uploads\/2023\/08\/Open-Outlook-OST-File-5-300x234.png 300w\" sizes=\"auto, (max-width: 443px) 100vw, 443px\" \/><\/p>\n<p>2). <a href=\"https:\/\/www.trustvare.com\/ost\/pst\/\">Conversion of OST to PST<\/a> is another option to solve OST problem. There are tools that offer repairing and conversion of OST to reliable file format. They are user-friendly and don\u2019t need technical assistance to run. You can consider a professional application for repairing and conversion of OST files.<\/p>\n<p style=\"text-align: center;\"><a class=\"maxbutton-1 maxbutton maxbutton-download-now\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.trustvare.com\/dl\/trustostdemo.exe\"><span class='mb-text'>Download Now<\/span><\/a> <a class=\"maxbutton-2 maxbutton maxbutton-buy-now\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.trustvare.com\/orders\/ost\/\"><span class='mb-text'>Buy Now<\/span><\/a><\/p>\n<h5><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p>Overall, you can get rid of the problem of \u201cOutlook OST File is in use and cannot be accessed.\u201d In this way, you can access OST files on PST without losing quality and structure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Open Outlook OST File is in Use and Cannot Be Accessed. Is the problem you face? Do you know MS Outlook integration with MS Exchange Server when users want to work offline? OST file is created which is an exact copy of the Exchange Server data. The data is created in the Cached Exchange mode &#8230; <a title=\"How Do I Fix- &#8220;Username .ost is in Use &#038; Can&#8217;t be Accessed?\" class=\"read-more\" href=\"https:\/\/www.trustvare.com\/blog\/fix-username-ost-is-in-use-cant-be-accessed\/\" aria-label=\"More on How Do I Fix- &#8220;Username .ost is in Use &#038; Can&#8217;t be Accessed?\">Read more<\/a><\/p>\n","protected":false},"author":4,"featured_media":1403,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,47],"tags":[],"class_list":["post-1396","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-ost-converter"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Free Method to Fix Username .ost is in Use &amp; Can&#039;t be Accessed Issue<\/title>\n<meta name=\"description\" content=\"Learn this post to resolved the &quot;Username .ost is in Use &amp; Can&#039;t be Accessed&quot;. 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