Manual Process to Convert Offline OST file into PST File, 100% Free of Cost

Exchange OST file exceeds the prescribed size limit or is corrupted, then the Microsoft Outlook user offline OST file fails to access the data through the Outlook. So how can any user see their important mailbox data from an inaccessible OST file in any version of MS Outlook? Let’s learn some simple ways to recover Outlook data from corrupt OST file and see your emails and other valuable data in the MS Outlook application.

Microsoft Outlook is one of the most spectacular email clients that the user uses to communicate in the form of their daily routine, for business work, corporate work or to talk to friends. As is known, Outlook creates two types of files which we know by the name of offline OST file and PST file.

What is OST & PST File?

The OST file is also called an offline storage table which keeps our email data such as emails, contacts, calendars, archive files, fax, voice mail, and attachment data into the connectivity of the Exchange Server in our local computer. It is very flexible to use it, it has to be very careful that the file is not corrupted.

Whereas PST files or also called Personal Storage Table and isn’t utilized in MS Exchange server. As mentioned earlier, it keeps on servers except for Exchange server and on users hard disk. IMAP and even HTTP use PST file folders. Thus emails that are sent or received and attached to them are stored in PST format. Even your emails, calendars, journals, contacts and alternative mailbox items that are locally keep is also saved in .pst format.

Let us know what causes the OST file to be corrupted.


As we know, OST File is used for offline mode in offline mode and are synchronized automatically after connecting to the Internet. It is used by MS Exchange servers in the MS environment. This feature changes users to Read, compose, delete and even reply to emails that too in offline mode.

For some reasons, our OST file gets corrupted and degraded so that we cannot read or open that file again in Outlook. And to read this file again we have to convert it to another format of Outlook PST.

  • Exchange OST File Size limitation.
  • Unfortunately Exchange Server Down.
  • System Corruption Issue
  • Power failure
  • Virus & Malware Attack.
  • Window corruption etc.

How to Convert OST to PST Manually Process


Although there is a unit several OST to PST converter tools on the market on-line store, however, before using them, we suggest users use manual ways, whereas OST files have to be compelled to be exported within the PST file format. I’m telling you about a freeway, “Import & Export method”.

Step-1: Launch Microsoft Outlook & Select the Menu “FILE TAB”.

Step-2: After click on the File tab then select “OPEN & EXPORT” option.

Step-3: After that, go to Import/Export option after clicking on “Open & Export option“.

Step-4: After click, then Now in Import and Export Wizard dialog box in which select on “Export to a file” then click “Next” to proceed forward.

Step-5: Now click on Outlook data file (.pst) and click “Next” to move further with the process.

Step-6: Now, you select the mailbox folder and subfolder to export from to export data into PST file then select “Next”.

Step-7: Now, click on “Allow duplicates to be created” to export the files and then click “Finish” the program as shown below.

Although an Outlook user can easily go ahead with a manual method to accomplish this task, but this method does not guarantee data security and even there is always a possibility of errors and a professional approach Decrease. Apart from this, the basic solution OST is not a successful approach to fully trust to deal with corruption problems.

So What Next? In these situations.

In such a condition, if you want to try a third-party tool ATS OST to PST Converter tool. ATS Software Company released a new version of OST to PST Converter tool. This software repairs any kind of corruption file and recover mailbox data with deleted items and convert into Outlook PST file. In Conversion of OST file data into several file formats such as EML, EMLX, MBOX, vCal, vCard, HTML, PDF and NSF file format. In Cloud option to directly export offline OST file to office 365, Live Exchange Server, and, etc to software has the ability to export Data without any troubling issue. if your OST file size very large and you want to split as “file size” or ” Two Dates between”  etc to allow split this software into PST files.


Company Provides a Demo version of OST to PST Converter tool to use a free of Cost. In demo version software allow to repair & recover any size of OST file but save only 30 emails items per folder in each file-formats including Cloud application.

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