OST Recovery has always been a topic of much consideration when an enterprise faces inaccessibility issues of OST file. In today scenario, OST corruption has bad impact, but honestly, if we talk about the present time, things have become much easier for recovery of corrupted email and permanently deleted emails too and all thanks to the third party solutions i.e. PST Converter. Before discussing about third party solutions, let’s see about OST file.

  • MS Outlook provides a very good facility to work offline when it is used in conjunction with Microsoft Exchange server. OST file is the replica of mailboxes stored on the Exchange Server. Working offline facility allows us to work offline with mailboxes even in the downtime of Exchange server.
  • To open an orphan ost file, users have only one option to convert them into another format. On the other hand, Outlook® by Microsoft is becoming a choice of many enterprises. Many third party solutions like Microsoft OST to PST Converter serves a better purpose to repair, recover and convert .ost files into a Microsoft PST format.

Using Microsoft OST to PST Converter

SysTools ost to pst converter

Today we are going to have a discussion on how to repair ost files having major corruption issues as well as which is the perfect tool to convert an ost file into an Outlook pst format. A product named as Microsoft OST to PST Converter is analyzed for its potential to repair ost file and recover ost file which is permanently deleted i.e you can convert .ost files into a Microsoft PST. Microsoft OST to PST Converter is the advanced tool which implements a technical algorithm to split large/oversized pst file also. Tool has several quality attributes which make the conversion very simple.

Product Specification:

  • Developers: SysTools
  • Function: Convert OST Files to PST
  • Current Version:4.5
  • Size:18.7 MB
  • Trial Version: Available

Product Description:

Microsoft OST to PST Converter is the highly revolutionary solution to convert ost files into Outlook pst format by keeping all original meta details of mail. This tool uses advanced scanning option to repair ost files having major corruption issues. Recovery of ost file is also possible, which is permanently deleted. Users can export selective mail and option to save the ost file as eml or msg is also available.

Steps Required to Convert OST Files to PST Format

Install and Run OST to PST Converter. To initiate processing, click on the “Add File” button on the menu bar.Microsoft OST to PST Converter : add file

Choose the path of ost file from any location of computer, software will scan the ost file and shows the file size in KB.ost to pst scanning


When scanning finishes, following screen appears, after scanning of mails below screen appears. Users can see previews of all mail via “switch view mode”.

ost to pst inbox normal mail view

To export an OST mail into PST format(right click on selective mail >> choose export), users need to choose the format (PST, EML and MSG) in which they want to access recovered ost files.ost to pst file browse

ost to pst mail filterAfter clicking on Export option, exporting process begins as shown in following screen.

ost to pst exporting

Analyzing the Output:

The procedure of exporting ost file into pst format executed successfully. Also, the Deleted Items, Junk Emails, and Sent items folders were included with the tool while conversion.

Application for Microsoft OST to PST Conversion does not harm original formatting of email through the conversion.

The speed of the tool is fine, but it could be improved when Advance Scan Option is used. The option to export selective mail is also available.

Trial version of software exports 25 emails per folder, if you want to export more than 25 items then always opt licensed version tool.

The option to split oversized pst file is also available, tested for 20 GB of OST file, results in the recovery rate of 2mbps.

Final Conclusion:

In comparison to other tools in the market with same functioning, Microsoft OST to PST tool has more features and better performance also. Considering the ability of the software for flawlessly recovery of ost file and export those ost files into PST format, I would rate this recovery software 8/10.