{"id":1202,"date":"2025-02-05T08:19:03","date_gmt":"2025-02-05T08:19:03","guid":{"rendered":"https:\/\/www.goldytools.com\/blog\/?p=1202"},"modified":"2025-02-05T08:19:03","modified_gmt":"2025-02-05T08:19:03","slug":"fix-the-outlook-error","status":"publish","type":"post","link":"https:\/\/www.goldytools.com\/blog\/fix-the-outlook-error\/","title":{"rendered":"Fix the Outlook error \u201cOst is not an Outlook Data File\u201d"},"content":{"rendered":"

Summary<\/h2>\n

Microsoft Outlook OST files store your crucial business data but are prone to getting damaged or throwing errors. One such error is \u201cOST is not an Outlook data file\u201d, which leads to data inaccessibility. In this blog, we will learn about the root cause of this error, along with reliable methods to fix the OST file. However, you can fix the inaccessibility of your OST file by converting it into PST using the advanced Goldytools OST to PST Converter<\/a><\/p>\n

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Introduction<\/h2>\n

Microsoft Outlook is a reliable email that allows users to work in offline mode by creating a synchronized copy of their entire Exchange Server data. It lets you work freely on the offline OST file when disconnected from the server and automatically updates the data after the connection is restored. The issue arises when Outlook is not able to read or access the OST file & its data due to \u201cOST is not an Outlook data file\u201d error. These issues can occur after procuring corruption & bringing downtime, and also risk on your sensitive data, so you need to repair the OST file to proceed required operations.<\/p>\n

There can be some common reasons behind the occurrence of errors where you will see a popup message on the screen showing:<\/p>\n

\u201c\u201cCannot start Microsoft Outlook. Cannot open the Outlook Window. The set of folders cannot be opened. The file c:\\Users\\USERNAME\\Local\\Microsoft\\Outlook\\abc@xyz.com.ost is not an Outlook data file (.ost).\u201d\u201d<\/p>\n

\"ost\"<\/p>\n

What results in \u201cOST is not an Outlook data file\u201d<\/h2>\n

Microsoft Outlook is indeed a reliable collaborative platform for organizations that are managing their business. But, the occurrence of errors is very common while using an OST file, which can be derived from different reasons. By undertaking the respective measures you can avoid experiencing such errors. Let\u2019s discuss some of the most common reasons behind such errors:<\/p>\n