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How to Disable Outlook OST File? – Working Steps

Published By Nilesh Kumar
Debasish Pramanik
Approved By Debasish Pramanik
Published On January 23rd, 2024
Reading Time 4 Minutes Reading
Category Outlook Tips

OST represents Offline Storage Table as an offline folder file in MS Outlook. It empowers an offline mode in Outlook and permits the client to work in offline mode. And when it connects to the Internet it will synchronize with the Exchange server automatically.

It gets advantageous in situations where you have constrained or no availability of the internet. With the help of the OST file, the client can work with their offline inbox and outbox locally. These progressions are reflected just once the framework is connected to the internet.

But there are times when you need to how to disable the OST files because of unavoidable reasons. In the event that the OST file is not required, at that point, you would need to disable it. Moreover, if the OST file gets corrupted, then the main alternative is to delete the OST file or repair it through some third-party tool.

Therefore, in this blog, we are going to discuss how to disable OST files.

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Follow The Steps to Disable OST File

Step1: First, synchronize the OST file from Offline folders to Exchange Server folders. You can use any of the procedures listed here –

  • To synchronize an individual folder, Go to Tools menu>Send/Receive then click on the Required folder.
  • To synchronize all folders, you must have them set for offline use, again go to Tools menu>Send/Receive option, and afterward select Send/Receive All option.
  • If you want to synchronize a Send/Receive group of folders, then select Tools menu>Send/Receive followed by clicking on the name of Send/Receive group.

Step2: After synchronization, select Tools menu> Email Accounts > View or change existing email accounts and then click on the “Next” button.

Step3: Click on Microsoft Exchange Server in the list and click on the Change option.

Step4: Now, click on More Settings.

Step5: Then click on the Advanced tab from Offline Folder File Settings

Step6: Finally, choose Disable Offline Use button.

But, if you don’t want to disable it, you want to delete the OST file. Then, follow the below-mentioned steps to delete the OST file.

Deleting OST File

Step1: In order to delete the OST file, initially just stop MS Outlook if it is running.

Step2: Next, click on the Start button and select Run or you can press the Windows + R button.

Step3: In the Run window’s Open field, enter the below order – “%APPDATA%\Microsoft\Outlook\” and hit enter.

Step4: The Explorer window shows up now; here find the OST file which you wish to delete. Choose it, and press the Delete button.

Step5: You get a warning inquiring as to whether you make certain of deleting the file. Then, click on the Yes to delete the OST file.

Moreover, if your OST file is corrupted and you want to recover or fix the corrupted OST file then you can export the OST file into a PST file and then directly import OST to Outlook using the Import/Export wizard.

Now, in order to convert the file, the best method is using the OST Conversion Tool. This tool is a very advanced tool that can easily change the OST file extension into a PST file.


MS Outlook widely used email client and it stores emails in the OST file so, sometimes the user needs to delete or disable the OST file. Therefore, in this blog, we have discussed how to disable the OST file or how turn off the OST file. Moreover, we have also discussed how to delete the OST file.

Additionally, sometimes the OST file gets corrupted due to many reasons so this user needs to repair the OST file.


By Nilesh Kumar

As a Chief Technical Writer, I know the technical issues faced by home and professional users. So, I decided to share all my knowledge via this blog. I love to help you with challenges while dealing with technical jargon.