How to Fix/resolve the error ".ost is not an Outlook data file"?

How to Fix/Resolve the Error ".ost is not an Outlook Data File"?

Overview

Outlook plays an important role in managing user email’s data and the best part of this application is it provides a facility to work in offline mode with OST file. When you lose connectivity with the Server, you can simply continue your work with OST file and when the connectivity is established again, OST files get synchronized with Outlook.

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Why users get this error?

Outlook throws various types of errors sometimes because of making sync with Exchange Server or multiple reasons. One of the common errors is “.ost file is not an Outlook data file”. There are several reasons behind this error –

• Damage or corruption in OST file
• Synchronization issue between Outlook and Exchange Server
• Sudden power cut issue
• The sudden closing of MS Outlook

Default location of .ost file

If you are facing the error while opening OST file in Outlook. You need to know the default location of your .ost file. Here is the path – C:\Users\user name\AppData\Local\Microsoft\user name\username.ost.

Resolution for the error

There are several techniques that enable the user to resolve or fix the error. You can go for the manual method. The steps are given below for the manual process –

• Exit Outlook. Go to Control Panel and click on Mail button
• In Mail Setup, click on Show Profiles. Choose your profile and choose properties
• Select Exchange Account in Mail tab and click on Change button. Enable Use Cached Exchange Mode
• Go to more settings in the Advanced tab, select offline folder file settings
• Select disable offline use option and click on Yes
• Again, go to offline folder file settings, select ok and yes
• Under Cached Exchange Mode settings, tick the option Use Cached Exchange Mode
• Click on the Ok button, go to Next and then Finish option
• Close Account Settings and Mail Setup wizard

Automated solution

If you don’t want to follow the manual procedure or is not comfortable with the manual technique due to its disadvantages like time-consuming and complex process. You can try the professional technique that will help you to quickly and easily fix OST issues in a few moments. The utility itself explains the whole process to export offline outlook folder file to PST format. The application contains multiple features that will make simpler for you to fix the issue.