OST PST Viewer is Windows standalone software, which operates even without Microsoft Outlook installed. You don’t need to spend extra time for becoming familiar with the interface. When you open Outlook data file in OST PST Viewer everything will be in its proper place. Quickly view PST and OST files content without Outlook.

• How To Open Ost File In Outlook

Sometimes you are stuck in a situation when you cannot open your MS Outlook emails stored in your OST files. The reason can be anything like data corruption or damage.
And this situation leads to a simple question “how to open OST file without Outlook”.
In this blog post, we will discuss some of the basic steps that you can take to open OST files without Exchange Server or Microsoft Outlook.

To read or view OST files, three important factors are taken into consideration

1. MS Outlook and Exchange Server requirements.
2. Presence of MS Outlook profile that has been used to create OST File in the system.
3. Availability of OST files that are corrupt or damage free.

How To Open Ost File In Outlook

So before moving ahead with the methods and procedures, let us understand what is an OST file?

What is an OST file?

Offline storage table files or OST files are offline files that store Outlook mail data and make it available to users when they are offline or not connected to the Internet. The offline storage tables store mail data using the .ost extension in the system. These files enable users to work with their offline inbox, offline outbox and make changes that are initially saved locally and are reflected in the server when the computer is connected to the Internet. Users can add, modify and delete the contents of these files just as a file located on the server can be changed and updated.

How to Open or View OST files without MS Exchange server or Outlook?

The only way through which you can view, read or open OST files is by using a reliable OST Viewer Tool.

Unfortunately, there are lots of online OST viewer tools available in the market but most of them are paid. Even, those which are free are not that reliable.

But there is one tool which I would like to refer you and that is the OST File Viewer tool for SysInfo

The software lets you open, view and read the OST files in the absence of MS Outlook as well as Exchange server. Not only this, the application supports viewing of both corrupt / inaccessible and healthy OST files and displays all the emails, Calender, contacts, notes, tasks and journal entries etc. In addition to this, the OST viewer tool is a Windows based software and thus compatible with all available versions of Windows such as 10,8,7, Vista,2000,2003 and XP.
You may also read:How to Retrieve Emails from OST File Within A Minute

Pros:

• Let’s you view, read and open Offline OST files without MS Outlook & Exchange server
• Display all your Outlook emails & mailbox contents like emails, contacts, calendars, notes, journal entries, tasks and so on.
• Support viewing of both healthy as well as corrupt OST files
• Loaded with advanced scanning options
• Auto file detection
• Advanced preview feature
• Runs smoothly on all versions of Windows 10, 8, 7, Vista, 2003, XP and 2000
• And it’s free

Cons:

• Doesn’t support MAC OS
• Doesn’t run on Linux

How To Use The Software

You may follow the below steps to open OST file without Outlook:

• Launch the software & select the files that you want to view & also select the recovery mode if your files are corrupt and click OK
  
• Once scanning is done, Click on Ok
  
• Now you can double click on the files shown in the preview section to view their content
  

Conclusion:

This is the simplest method to view and open OST files without MS Outlook and exchange server. So, you can continue with your outlook related work easily with the help of this Free OST viewer tool.

Hope this article helps.

Microsoft Outlook 2010 doesn’t support manually opening or importing items from an offline Outlook Data File (.ost).

Note: By default, when you add an account that uses an offline Outlook Data File (.ost), the file is automatically created and data from the server is downloaded. Also, if you specify a new folder location for the offline Outlook Data File (.ost), a new file is automatically created. Although not required, you can manually move the existing file to the new folder to avoid the download time that is required to re-create the file. For more information, see Move an Outlook data file.

Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail). Outlook Data Files (.ost) are always copies of items that are saved on a mail server and don’t need to be backed up like Outlook Data Files (.pst).

Re-create an offline Outlook Data File (.ost)

Offline Outlook Data Files (.ost) are copies of your Exchange information. It is not necessary to back up this file. You can create a new copy at any time.

1. Exit Outlook.

2. In Control Panel, click or double-click Mail.

   Where is Mail in Control Panel?

   Mail appears in different Control Panel locations depending upon the version of the Microsoft Windows operating system, Control Panel view selected, and whether a 32- or 64-bit operating system or version of Outlook 2010 is installed.

   The easiest way to locate Mail is to open Control Panel in Windows, and then in the Search box at the top of window, type Mail. In Control Panel for Windows XP, type Mail in the Address box.
   

   Note: The Mail icon appears after Outlook starts for the first time.

   The title bar of the Mail Setup dialog box contains the name of the current profile. To select a different existing profile, click Show Profiles, select the profile name, and then click Properties.

3. On the E-mail tab, select the Exchange account, and then click Change.

4. Clear the Use Cached Exchange Mode check box.

5. Click More Settings.

6. On the Advanced tab, click Offline Folder File Settings.

7. Click Disable Offline Use, and then in the dialog box that appears, click Yes.

   Note: If you cannot click Disable Offline Use, this indicates the Use Cached Exchange Mode check box was not cleared in step 4. This check box must be cleared.

8. Again, click Offline Folder File Settings.

9. Click OK.

10. In the dialog box that appears, click Yes.

11. Under Cached Exchange Mode Settings, select the Use Cached Exchange Mode check box.

12. Click OK, click Next, and then click Finish.

13. In the Account Settings and Mail Setup dialog boxes, click Close.