How to open an .ost file in Microsoft Outlook without Exchange Server?

OST2PST SET Converter

OST2PST Set (download) can open an .ost file without the need for Microsoft Outlook, Microsoft Exchange Server or Windows Domain Controller. OST2PST Set easily reads data from the OST format and converts it to the PST format.

This Microsoft Outlook OST PST converter lets you open Outlook files offline so that an Outlook mailbox can be opened without any connection to an e-mail server. This utility also parses corrupted .ost files for data conversion into PST files. Here are some features of application:

  • The download converter in OST2PST Set is very small in size.
  • It's fully compatible with all versions of Windows.
  • It works with any version of Microsoft Outlook (except 64-bit).
  • It converts very large mailboxes in the OST format.
  • The OST-to-PST conversion tool uses a simple interface that anyone can use right away.
  • It explains how to open an OST file in Outlook by providing clear guidelines and instructions.
  • It accesses and converts password-protected OST files.
  • OST2PST Set converts encrypted .ost files.
  • It doesn't need Windows Domain Controller for mailbox conversion.
  • It offers data output in a variety of formats, including EML, VCF, MSG, TXT and PST.
  • It makes no modifications to input documents.
  • OST2PST Set converts all objects found in .ost files, including contacts, messages, attachments and others.
  • It automatically fixes errors during the conversion process when necessary.
  • OST2PST Set creates PST files that can be opened offline.

How to open ost files in Outlook

OST2PST Set is the easiest way to open .ost files in Outlook. It converts the data into clean .pst files, which are accessible offline. This application is free to try. Once you decide to get this tool, the conversion of .ost files can be done in minutes on any compatible hardware configuration.


  • Windows 98 and above
  • Installed Microsoft Outlook x32 (not x64)

You can download the demo version of OST2PST Set:


Download DEMO version of OST2PST Set

from our website

Outlook Errors

  • Task 'Microsoft Exchange Server - Receiving' reported error (0x8004060C): 'Unknown Error 0x8004060C'
  • Network problems are preventing connection to the Microsoft Exchange Server computer. Contact your system administrator if this condition persists.
  • An unexpected error prevented access to this file. Use ScanDisk to check the disk for errors, and then try using the Inbox Repair tool again.
  • Microsoft Outlook has encountered a problem and needs to close. We are sorry for the inconvenience.
  • Unable to display the folder. The file Outlook.pst could not be accessed. Access denied.
  • Cannot expand the folder.
  • The set of folders cannot be opened.
  • Scanpst reports "An unknown error prevented access to the file. Error 0x80070570: The file or directory is corrupted and unreadable".
  • Unable to open your default e-mail folders.
  • Unable to display the personal Outlook folder.

How it Work?


Download software from website.


Start Install software:

  • Press on downloaded installation file in browser
  • Select a downloaded installation file in Windows Explorer and press Enter or double click on it.


Please confirm warning message:


Run installation wizard:


Run program:

  • Double click on icon on desktop:


  • Select from main menu: Start | Programs | OST2PST Set | OST2PST Set


Please select *.ost file of Microsoft Exchange Server:

You can OST file:


And click the Next button.


Please select a mode for program use:

  • Converter Mode – use it for export data from OST to PST files.


Please confirm start recovery:


On the second page, the customer can view and select the converted objects that are to be saved (emails, contacts, appointments and so on):


Click the Next button:


Please select a target folder for saving data to:


And click the Next button.


Please select the type of the converted that is to be saved:


On the last page, you will find a detailed log of the converted process:


Video Manual


$ 39


  • Credit Card
  • Purchase Order
  • Phone / Fax
  • Order
  • Check / Cash
  • PayPal
  • Wire Transfer
Buy Now

$ 59


  • Credit Card
  • Purchase Order
  • Phone / Fax
  • Order
  • Check / Cash
  • PayPal
  • Wire Transfer
Buy Now

$ 99


  • Credit Card
  • Purchase Order
  • Phone / Fax
  • Order
  • Check / Cash
  • PayPal
  • Wire Transfer
Buy Now