Fixing Error “Outlook.ost is not an offline file”

The OST file contains all the important information of Outlook in a well organized manner. It allows users to work both online and offline. It automatically configures connection with Exchange Server without causing any trouble in the workflow. That’s why OST is a popular file extension.

But sometimes, synchronization issue is raised because of corruption in the OST file. At that time, Outlook users are prevented to access the OST files. Many times, users encounter an Error Message- Can’t open your default email folders, the Outlook.ost is not an offline folder file. This could be a nightmare experience for any user.

Top Reasons for the Error

There are two main causes that can trigger the error.

  1. The OST file get damaged and Outlook fails to identify it
  2. You might be using Outlook in conjunction with Exchange Server and the Server is not capable to open the targeted mailbox, hence giving the error message

Troubleshooting the Error

To find out the solution of the error all you need to recover or convert your OST file to PST format. You can take help from the inbuilt tool Scanost.exe. If the problem is not resolved, going with a third tool could be the best way. Choose OST to PST Converter application of us to transfer entire data of OST to PST. After that you can import that PST to Outlook. The software is highly compatible, interactive and safe. It performs custom migration. The speed of conversion is excellent. Save conversion time and give the desired results. A purely Windows based application. Run the app on Windows 10/8/7/XP/Vista. All the Outlook versions are supported including 2003, 2007, 2013 and 2016.

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