{"id":41677,"date":"2019-06-21T11:32:48","date_gmt":"2019-06-21T11:32:48","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=41677"},"modified":"2025-04-07T10:14:56","modified_gmt":"2025-04-07T10:14:56","slug":"error-solved-ost-is-not-an-outlook-data-file","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/error-solved-ost-is-not-an-outlook-data-file\/","title":{"rendered":"Error Solved: OST is not an Outlook Data File"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>OST files are created when you add an IMAP, Exchange, or Microsoft 365 account in Outlook. OST file stores the synchronized copy of your mailbox data on the mailbox server and allows offline access to the mailbox data. Sometimes, Outlook OST files get damaged, corrupted, or turn inaccessible due to various reasons, preventing you from accessing the emails and other items. When you try to access the damaged OST file, Outlook displays the following error message:<\/p><blockquote class=\"note_alert\">\n<p><em>&ldquo;Cannot start Microsoft Outlook. Cannot open the Outlook Window. The set of folders cannot be opened. The file&nbsp;c:\\Users\\USERNAME\\Local\\Microsoft\\Outlook\\abc@xyz.com.ost&nbsp;is not an Outlook Data File (.ost).&rdquo;<\/em><\/p>\n<\/blockquote><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"407\" height=\"176\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/06\/Microsoft-Outlook.png\" alt=\"c:\\Users\\USERNAME\\Local\\Microsoft\\Outlook\\abc@xyz.com.ost&nbsp;is not an Outlook Data File (.ost)\" class=\"wp-image-85144 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/06\/Microsoft-Outlook.png 407w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2019\/06\/Microsoft-Outlook-300x130.png 300w\" sizes=\"auto, (max-width: 407px) 100vw, 407px\" \/><\/figure>\n<\/div><p>Below we will mention the reasons that may trigger the OST is not an Outlook data file error and the solutions to effectively troubleshoot and resolve it.<\/p><h2 class=\"wp-block-heading\" id=\"reasons-behind-the-&lsquo;ost-is-not-an-outlook-data-file&rsquo;-error\"><strong><strong>Reasons behind the &lsquo;OST is not an Outlook Data File&rsquo; Error<\/strong><\/strong><\/h2><p>This error may occur due to several reasons. In most cases, it occurs when the OST file gets damaged due to integrity issues caused by one or more of the following reasons:<\/p><ul class=\"wp-block-list\">\n<li>Large OST file size (oversizing)<\/li>\n\n\n\n<li>Virus\/malware intrusion<\/li>\n\n\n\n<li>Synchronization errors between Outlook and mailbox server<\/li>\n\n\n\n<li>System crash<\/li>\n\n\n\n<li>Hardware failure<\/li>\n\n\n\n<li>Outdated or corrupt\/damaged Outlook installation<\/li>\n\n\n\n<li>Compatibility issues<\/li>\n\n\n\n<li>Sudden or forced system shutdown<\/li>\n\n\n\n<li>Force termination of Outlook<\/li>\n\n\n\n<li>Corrupt Outlook profile<\/li>\n\n\n\n<li>Faulty or incompatible add-ins<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"methods-to-resolve-the-ost-is-not-an-outlook-data-file-error\"><strong><strong>Methods to Resolve the OST is not an Outlook Data File Error<\/strong><\/strong><\/h2><p>You can follow the methods discussed below to troubleshoot and fix the OST is not an Outlook Data File error.<\/p><h3 class=\"wp-block-heading\">Method 1: Update Outlook and Windows<\/h3><p>If your Outlook or Windows is outdated, then it can lead to compatibility issues that may trigger such errors in Outlook. Thus, you can check and update both Outlook and Windows. The steps to update Outlook are as follows:<\/p><ul class=\"wp-block-list\">\n<li>Open Outlook, and go to <strong>File &gt; Office Account &gt; Update Options<\/strong>.<\/li>\n\n\n\n<li>From the available options, choose <strong>Update Now<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"672\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-2.png\" alt=\"Choose Update Now.\" class=\"wp-image-170841 apply-gradient-on-post-images\" style=\"width:688px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-2.png 900w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-2-300x224.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-2-768x573.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-2-150x112.png 150w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>If a new update is available, Outlook will start a wizard and download the latest updates. You need to complete the update wizard.<\/li>\n<\/ul><p>To update Windows, follow these steps:<\/p><ol class=\"wp-block-list\">\n<li>Go to <strong>Settings &gt; Windows Update<\/strong>.<\/li>\n\n\n\n<li>Check for the Windows Updates.<\/li>\n\n\n\n<li>If new updates are available, download and install them.<\/li>\n\n\n\n<li>Then, restart the system.<\/li>\n<\/ol><p>After this, start Outlook and check if the OST is not an Outlook data file error is resolved. If not, move to the next method.<\/p><h3 class=\"wp-block-heading\">Method 2: Remove Faulty Add-Ins<\/h3><p>Faulty add-ins can cause Outlook to crash, leading to errors, such as OST is not an Outlook data file. You can resolve this by removing the incompatible or faulty add-in from Outlook. The steps are as follows:<\/p><ul class=\"wp-block-list\">\n<li>Press <strong>Windows + R<\/strong>, type <strong>outlook.exe \/safe<\/strong>, and press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>In Outlook 2007 and 2010, go to <strong>Outlook Options &gt; Add-ins &gt; Go<\/strong>. In Outlook 2013 and later, go to <strong>File &gt; Options &gt; Manage COM Add-Ins<\/strong>. This opens up a dialog box listing all installed add-ins.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"772\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-3.png\" alt=\"Outlook 2007 and 2010, go to Outlook Options &gt; Add-ins &gt; Go. In Outlook 2013 and later, go to File &gt; Options &gt; Manage COM Add-Ins. This opens up a dialog box listing all installed add-in\" class=\"wp-image-170843 apply-gradient-on-post-images\" style=\"width:840px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-3.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-3-300x246.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-3-768x631.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-3-150x123.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Uncheck all&nbsp;<em>Add-Ins&nbsp;<\/em>and click <strong>OK <\/strong>to disable them.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"813\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-4.png\" alt=\"Uncheck all&nbsp;Add-Ins&nbsp;and click OK to disable them.\" class=\"wp-image-170844 apply-gradient-on-post-images\" style=\"width:696px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-4.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-4-300x259.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-4-768x664.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-4-150x130.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><p>Restart Outlook normally.<strong> <\/strong>If you&rsquo;re able to access Outlook emails and send\/receive new messages, it means any faulty add-ins were causing the issue.<\/p><p>Now, enable one add-in at a time and then restart Outlook to check which add-in is faulty. Once found, uninstall or remove it from the Outlook.<\/p><h3 class=\"wp-block-heading\"><strong><strong>Method 3: Disable Cached Exchange Mode<\/strong><\/strong><\/h3><p><a href=\"https:\/\/www.stellarinfo.com\/blog\/turn-off-cached-exchange-mode-in-outlook\/\">Disabling the Cached Exchange Mode&nbsp;<\/a>also disables&nbsp;<strong>Offline access mode<\/strong> and directly connects Outlook with the mailbox server instead of saving changes in the OST file. This can help you overcome the error. However, you can enable the Cached Exchange Mode later. To disable Cached Exchange Mode, follow these steps:<\/p><ul class=\"wp-block-list\">\n<li>Navigate to<strong>&nbsp;File &gt; Account Settings &gt; Account Settings<\/strong>&nbsp;and then select your Outlook profile.<\/li>\n\n\n\n<li>Click&nbsp;<strong>Change<\/strong>&nbsp;and then uncheck the &lsquo;<strong>Use Cached Exchange Mode<\/strong>&lsquo; checkbox and click &lsquo;<strong>Next.<\/strong>&lsquo;<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"671\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-5.png\" alt=\"Change&nbsp;and then uncheck the &lsquo;Use Cached Exchange Mode&lsquo; checkbox and click &lsquo;Next.\" class=\"wp-image-170848 apply-gradient-on-post-images\" style=\"width:628px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-5.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-5-300x214.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-5-768x548.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-5-150x107.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Click &lsquo;<strong>OK<\/strong>&lsquo; when a pop-up appears and then click &lsquo;<strong>Finish.<\/strong>&lsquo;<\/li>\n\n\n\n<li>Restart Outlook and check if the error is gone.<\/li>\n<\/ul><h3 class=\"wp-block-heading\">Method 4: Repair Outlook Profile<\/h3><p>OST files associated with a corrupt Outlook profile may become inaccessible and result in this OST file error. To resolve this, you can <a href=\"https:\/\/www.stellarinfo.com\/blog\/repair-profile-outlook-2007-2010-2013-2016\/\">repair your Outlook profile<\/a>. The steps are as follows:<\/p><ul class=\"wp-block-list\">\n<li>In Outlook 2010, 2013, 2016, or 2019, navigate to&nbsp;<strong>File &gt;<\/strong>&nbsp;<strong>Account Settings &gt; Account Settings<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"675\" height=\"652\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-6.png\" alt=\"Outlook 2010, 2013, 2016, or 2019, navigate to&nbsp;File &gt;&nbsp;Account Settings &gt; Account Settings\" class=\"wp-image-170851 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-6.png 675w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-6-300x290.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-6-150x145.png 150w\" sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Click the Email tab and choose your account (Profile).<\/li>\n\n\n\n<li>Click on the Repair option.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"770\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-7.png\" alt=\"Click on the Repair option\" class=\"wp-image-170855 apply-gradient-on-post-images\" style=\"width:752px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-7.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-7-300x246.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-7-768x629.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-7-150x123.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Follow the prompts in the &lsquo;<strong>Repair Account<\/strong>&rsquo; wizard.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"669\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-8.png\" alt=\"Follow the prompts in the &lsquo;Repair Account&rsquo; wizard\" class=\"wp-image-170857 apply-gradient-on-post-images\" style=\"width:730px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-8.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-8-300x214.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-8-768x547.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-8-150x107.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><p>Once done, restart Outlook and check if the error is resolved. If not, you can create a new Outlook profile.<\/p><h3 class=\"wp-block-heading\">Method 5: Create a New Outlook Profile<\/h3><p>When repairing the corrupt profile fails or does not work, you can <a href=\"https:\/\/www.stellarinfo.com\/article\/create-a-new-profile-on-outlook.php\">create a new Outlook profile<\/a>. The steps are as follows:<\/p><ul class=\"wp-block-list\">\n<li>Open&nbsp;<strong>Control Panel<\/strong> and click on &lsquo;<strong>Mail.<\/strong>&rsquo;<\/li>\n\n\n\n<li>Click&nbsp;<strong>Show Profiles.<\/strong><\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"442\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-9.png\" alt=\"Click&nbsp;Show Profiles\" class=\"wp-image-170859 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-9.png 695w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-9-300x191.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-9-150x95.png 150w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Click&nbsp;<strong>&lsquo;Add&rsquo;&nbsp;<\/strong>and then enter the new profile name. Click &lsquo;<strong>OK<\/strong>&lsquo;.<\/li>\n\n\n\n<li>In the<strong>&nbsp;&lsquo;Add Account&rsquo;&nbsp;<\/strong>wizard, enter the email ID and password. Click &lsquo;<strong>Next<\/strong>&lsquo;.<\/li>\n\n\n\n<li>Choose the new profile from the options and enable&nbsp;<strong>&lsquo;Always use this profile<\/strong>&lsquo; or choose the &lsquo;<strong>Prompt for a profile to be used&rsquo;&nbsp;<\/strong>option and then click &lsquo;<strong>OK.<\/strong>&lsquo;<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"633\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-10.png\" alt=\"Choose the new profile from the options and enable&nbsp;&lsquo;Always use this profile\" class=\"wp-image-170860 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-10.png 538w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-10-255x300.png 255w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-10-150x176.png 150w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/figure>\n<\/div><p><\/p><ul type=\"disc\"><li class=\"MsoNormal\" style=\"color: rgb(24, 22, 23); line-height: normal; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\"><span lang=\"EN-IN\">Restart Outlook.<\/span><\/li><\/ul><h3 class=\"wp-block-heading\">Method 6: Recreate Outlook OST File<\/h3><p>If the OST file is damaged or corrupted, you can&nbsp;<a href=\"https:\/\/www.stellarinfo.com\/blog\/recreate-ost-file-outlook-2007-2010-2013-2016\/\">recreate a new OST file<\/a>&nbsp;by deleting or moving the inaccessible OST file to a different location. Follow these steps:<\/p><ul class=\"wp-block-list\">\n<li>Navigate to<strong>&nbsp;File &gt; Account Settings &gt; Account Settings.<\/strong><\/li>\n\n\n\n<li>Click the&nbsp;<strong>Data Files<\/strong>&nbsp;tab and select the OST file associated with your profile.<\/li>\n\n\n\n<li>Click &lsquo;<strong>Open File Location.<\/strong>&rsquo; This opens a new&nbsp;<strong>File Explorer<\/strong>&nbsp;window displaying the OST file location.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"940\" height=\"770\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-11.png\" alt=\"File Explorer&nbsp;window displaying the OST file location\" class=\"wp-image-170861 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-11.png 940w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-11-300x246.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-11-768x629.png 768w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/06\/image-11-150x123.png 150w\" sizes=\"auto, (max-width: 940px) 100vw, 940px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Close Outlook and move the OST file to another location for backup.<\/li>\n<\/ul><p>Now open Outlook. This will automatically create a new OST file. After this, check all mail items. In case of missing mail items, you can use Stellar Converter for OST software to extract the items from your <a href=\"https:\/\/www.stellarinfo.com\/blog\/how-to-backup-ost-file\/\">backup OST file<\/a> and save them to PST format. Then, you can import this PST into your new OST file via the Outlook Import\/Export wizard. You can also use the software to directly import the mail items from the OST file into an existing Outlook profile, Office 365, or live Exchange Server.<\/p><h2 class=\"wp-block-heading\" id=\"to-wrap-up\">To Wrap Up<\/h2><p>You can encounter the error OST is not an Outlook data file, if the OST file gets damaged or corrupted due to various reasons. However, you can resolve this by following the methods discussed in this post. However, if the error can&rsquo;t be resolved, you can use a reliable&nbsp;<a href=\"https:\/\/www.stellarinfo.com\/convert-ost-to-pst.php\" target=\"_blank\" rel=\"noreferrer noopener\">OST to PST converter software<\/a> to extract all the mailbox items from the inaccessible or orphaned OST file and save them to Outlook importable PST format. Once you have converted the mail items from your inaccessible OST to PST format, you can remove your current Outlook profile, set up a new Outlook profile, and configure your email account. Then, import the converted PST file into your newly set up Outlook profile via the Import Export wizard.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>OST files are created when you add an IMAP, Exchange, or Microsoft&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/error-solved-ost-is-not-an-outlook-data-file\/\">Continue reading <span class=\"screen-reader-text\">Error Solved: OST is not an Outlook Data File<\/span><\/a><\/p>\n","protected":false},"author":32,"featured_media":127264,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[821],"tags":[2141,2139,2142,2143,2137,2140,2138],"class_list":["post-41677","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook-data-file","tag-cannot-open-default-email-folders-ost-is-not-an-outlook-data-file","tag-cannot-start-microsoft-outlook-ost-is-not-an-outlook-data-file","tag-is-not-an-outlook-data-file-ost","tag-microsoft-exchange-ost-is-not-an-outlook-data-file","tag-ost-is-not-an-outlook-data-file","tag-outlook-2016-error-ost-is-not-an-outlook-data-file","tag-outlook-ost-is-not-an-outlook-data-file","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Error Solved: OST is not an Outlook Data 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