Do you want to open OST without connecting Exchange? Then, you arrive in the right place. In this blog, I will provide information to access OST files without Exchange.

OST files are Offline folder files. It permits MS Outlook users to work in offline mode (when MS Outlook without having an MS Exchange Server). In this, users can work in the offline mode and will get in sync with the Exchange Server once it is connected to the internet. These OST files enable the users to perform the work without an interrupted internet connection. 

The Outlook mailbox data gets stored in the OST files on Exchange Server. OST files, aka Outlook Data Files, are used to reinstall MS Outlook data during data loss or corruption.

If you want to approach an OST file, then MS Outlook must connect to the Exchange Server. However, in certain situations, users need to access OST files but are unable to do it due to poor connection. 

Some problems that are connected to these files, these are corruption issue, inaccessibility issue that may occur due to 

  • Attack of Virus,
  • Sudden system shutdown or
  • Because of the sudden deletion of the Outlook Account on the exchange server.

These issues make it a hard situation to open an OST file without an Exchange Server. You have to renew an OST file, and that will help you to approach the data. There are different methods to access OST files without Exchange.

Manual approach to open OST files Without Exchange Server

OST files are the offline file format of the data which is available on the server. The User can see the file from the server by using the downloading process. You can follow this instruction that given below to open OST without connecting Exchange:

  • First, take the exit from your MS Outlook

  • Then, open the Control Panel

  • After that, choose the option “Mail”.

  • A “Mail Setup” dialog box will be displayed on the page

  • Then. tap on the “Email Accounts” option

  • Now, a new Dialog Box Named “Account Setting” will be open

  • Then, visit the “Data Files” tab and select your account

  • Next, choose the OST file and then tap on “Open File Location”

  • Then, Right-tap on that OST file and then Delete it

Remember- Prior deleting the OST file, Take the exit from the Account Settings and Mail Setup Window or else you have to face an error.

  • Finally, again open the Outlook Application.

This procedure will automatically generate a new OST file by downloading the entire data from the Exchange Server.

Note - If you are a user of MS Outlook 2010, then it will not bear manual opening and importing OST file items.

You can try these steps to view and open an OST file via an exchange server. These steps can be useful only when the exchange server and your Outlook Account are synchronized well.

You can use this manual procedure, or by any chance, you are unable to perform this process then you can try the third party tool. The alternative method is the best tool to open OST without linking Exchange. It will execute the whole process safely and securely.

An Alternative Method:

You can use an OST Viewer that will help in opening and viewing OST files without connecting  Microsoft Outlook and Exchange Server. The tool can generate a log file at a user-preferred location that includes the file scanning information. The OST Viewer supports Windows 10, 8, 7, Vista, 2003, XP, and 2000.


This blog contains information related to open OST without connecting Exchange. This blog includes both manual and alternative methods. Users are free to use any one of the approaches. As you know, Manual methods require technical skills which are difficult for many users to perform. Then, they can use alternative methods to execute the process.