Importing .OST files into Outlook and converting them into .PST files


  • I have several former employees outlook files, and need to view them, when they were copied from the former-employees computer the format of the Outlook file was .ost which I can't import into Outlook (as I don't know how to). Is there a way to import .ost files into Outlook? And finally how would I convert them, as I believe you can do this through the Archive option within Outlook.

    Thanks in Advance

    Kamis, 09 Februari 2017 11.29

Semua Balasan

  • Hi,

    As Outlook provides an in-built utility to import only PST files, not the Outlook OST files. The best possible way to import these data files is to firstly convert the OST to PST and then using Outlook import feature to open PST file and access its data items.

    I would like to suggest you a blog which will guide you about how would you convert OST file to PST file manually and you don't need to purchase any commercial tool.

    See here;

    Hope it will solve your issues !!


    • Diedit oleh aliceaggie Kamis, 09 Februari 2017 11.50
    Kamis, 09 Februari 2017 11.49
  • Thanks for the information.

    However, the blog is of little use since it has little to no detail as how to convert .ost files into .pst files. That is the main obstacle here.

    Kind Regards


    Kamis, 09 Februari 2017 12.46
  • The OST File is just a local copy of the Mailbox from the Database. Why you want to import something that already exists? Create a new profile, let the user connect and you have a porper ost file. That you can export to pst.
    Kamis, 09 Februari 2017 12.59
  • The reason being that the user and their mailbox no longer exist, but I was able to recover the mailbox and give myself full access ... so hopefully fingers crossed I will be able to simply export a PST of her mailbox, rather than have to purchase third party software
    Kamis, 09 Februari 2017 15.31
  • Its ok, there are two options to access your former employees Outlook emails. Either you use OST Viewer tool which is absolutly Free to use from some of the vendors.

    Another way to access OST emails is by converting them to Outlook PST. For the same you can also refer to third party OST to PST Converter tools.

    Kamis, 09 Februari 2017 16.08
  • It's true, there's no official tool to open or convert .ost file to .pst file.

    Please note, the disabled mailbox or removed mailbox is not purged by Exchange immediately and can be reconnected, they are retained in the mailbox database until the deleted mailbox retention period expires, which is 30 days by default.

    More details, refer to Disconnected mailboxes.

    Best Regards,

    Allen Wang

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact

    Sabtu, 11 Februari 2017 04.51
  • Then this might help you:

    It is also better to use the said tool in above link.
    Minggu, 12 Februari 2017 12.58
  • The OST file is the local cached file from Exchange server. It will automatically be recreated when you create the new Outlook profile. 

    If “Exchange server is unavailable, email accounts are also deleted. The computer is also no longer exists”, then this is the case when Some third party tools might provide the feature to convert contents of the OST to PST. Lets Search in Google about ost to pst converter software. Please check this screenshots. 

    Senin, 13 Februari 2017 05.45
  • OST files can’t import to Outlook directly so first convert them into PST format by using OST Converter Wizard after that run MS Outlook and import converted PST files. The tool is available at affordable price with free demo edition.

    Rabu, 15 Februari 2017 12.01
  • You can easily access Outlook emails of your employees. Either the Outlook was corrupted or not, the user can repair and convert Outlook OST emails to PST. Visit to know the steps and process to convert OST file to PST successfully.

    Kamis, 09 Maret 2017 06.44
  • Hi,Zakmk96

    There are several methods to convert OST file to PST file.

    First, Microsoft does not provide an official tool to do the conversion. However, if you can access the contents of the OST file in your Outlook, then you can perform the conversion manually, as follows:

    1. Start Outlook. Make sure you can access all the contents in the OST file to be converted.

    2. Create a new PST file.

    3. Go to the OST file, select and copy all the contents to be converted with your mouse.

    4. Go back to the new PST file, then paste all the contents into the PST file

    That will do the conversion.

    You can also perform the conversion by export the contents of the OST file to a PST file by following the instructions at:

    Second, if you can access the Exchange server containing the account data for the OST file, then you can use Export-Mailbox command to export the data into a PST file, similar to convert your OST file into a PST file. Below is the article about doing that:

    Third, if you cannot access the OST file via Outlook, neither can you access the Exchange Server, then you can use a third-party OST to PST converter. The tool provides a free trial so you can try first to see if it works before purchase it.

    Good luck! 

    Jumat, 10 Maret 2017 01.47
  • Hi,

    OST file is the replica of MS Exchange which is a offline copy of Outlook. If you try to import OST file in Outlook, then it gives an error by Outlook. Due to several reasons Outlook does not allow to import OST file. But there is a option if want to access your OST data back, then convert your OST file to PST format by using OST to PST Converter. This will allow you to get your data back in Outlook.

    For More info: -

    Jumat, 10 Maret 2017 12.27
  • As per your query all you need is a OST to PST converter which can create a PST file for all your employees OST files. Using tool to convert OST file into PST is the easiest and safest possible solution to view inaccessible OST file content.
    Jumat, 17 Maret 2017 08.57
  • If you are looking for OST to PST tool then download this software, this Software will help you to Convert your OST to PST file format. You can try this software from here:

    Sabtu, 19 Agustus 2017 12.35
  • Thanks for your suggestion - all well


    It is also better to use the Microsoft OST to PST tool in above link.

    • Diedit oleh Dakin Walk Senin, 29 Oktober 2018 13.56 text update
    Kamis, 24 Agustus 2017 09.47
  • Get Exchange OST file converted into PST format for importing OST items into Microsoft Outlook.  It can be done in just 3 simple steps. You should try this tool to access OST items in any email platform.

    Jumat, 29 September 2017 12.04
  • Amazing tool! got all my email and contacts back for 100 bucks! thanks!
    Senin, 16 Oktober 2017 02.14
  • One of the great and successive solution which able to fix all the corruption issues of OST files and used for conversion OST files to PST files. This OST to PST Converter is more potentiality more conductive for MS Outlook users. In very easy and successive manner, the Outlook admin can successfully neutralize the entire issues of MS Outlook OST File and obliterate the entire impossibilities which could be hurdles in opening an .ost file.The program is proficient enough to export all the properties like To, Cc, Bcc, Date, subjects, and email headers in new file. The cost is very less in compare to other software. You can Download demo version of this software :
    • Disarankan sebagai Jawaban oleh shripriya90 Senin, 08 Oktober 2018 11.05
    Rabu, 27 Desember 2017 07.45
  • you cannot be import Ost file into outlook and converting them into PST format..?

    First you should try .scanost inbuilt utilities to analyze and fix the issues in your Outlook .ost/pst file.

    Microsoft Solution:

    In case, these solution steps do work then you may go for automated another tools for

    RISK FREE  KDETOOLS OST to PST Conversion....!


    David Marisoh |  MNC | KDETOOLS |

    • Disarankan sebagai Jawaban oleh Dakin Walk Rabu, 13 Juni 2018 14.15
    Rabu, 13 Juni 2018 13.50
  • Get OST to PST Converter software that is more capable to support damage and corrupt OST file data from such version of 5.0/5.5/2000/2003/2007/2010/2013 and 2016. DataVare OST to PST converter tool gives you risk free solution to convert OST file email, task, calendar, contacts, distribution, group etc after that convert OST to PST file with its emails metadata like as:- to/bcc/cc/subject/from and date and it has also an advance method to split large size of recovered MS outlook PST file. Visit for more info :
    Sabtu, 16 Juni 2018 07.14
  • Hi, firstly you have to convert OST files to PST and then you can import OST to PST file. So, in order to convert OST file to PST, use Indya Best OST to PST Converter that provides accurate result in just a few minutes. This software easily convert OST emails, contacts, calendar, attachments, etc. to PST format. 
    Senin, 02 Juli 2018 05.40
  • You do not have to worry for the Outlook mailbox corruption issue because the OST Recovery tool from the InQuit software is here to save your Outlook database without damaging any internal structure. It supports MS Outlook version 97, 98, 2000, 2002, and 2003, up to 2016 so it becomes easy to use in any system. It’s an amazing GUI make the conversion process simple and sophisticated.

    Read More:

    Rabu, 25 Juli 2018 05.02
  • I would suggest to get the  desktop version of  OST to PST Converter by CoolUtils. You don’t need to purchase right away as they offer a 30 day trial so, you can test it out before making the decision.

    It can convert complete data in OST to PST in its original form.

    Jumat, 27 Juli 2018 01.10
  • Some tools are available in the market, you can search through google or i will recommend Softaken OST to PST Converter tool, this software will help you to convert contacts from OST to PST file format. Go ahead and download free software.
    Sabtu, 04 Agustus 2018 10.36
  • I am unsure if you are allowed to use 3rd party software in your org or not. If you are then try Personal Mail Archiver as it works great for the type of conversion you are looking for.
    Senin, 13 Agustus 2018 06.29
  • No, You can import OST into Outlook, as there is no option in Outlook Import/Export Wizard to select OST File to import it But if you have configured an account with OST File then you can follow available Various Manual Solution Outlook OST File into PST Format.
    Since OST file created while configuring the account with Exchange Server and to convert this file into Personal storage file, you can use 3 Manual Solution such as:

    1) Drag & Drop Method

    2) Import & Export Method

    3) Automated Solution

    Solution 1: Drag & Drop Technique to Convert File

    Follow the given below steps:

    a) Open Outlook Application and Create New Profile with Default file format ( PST)

    b) Now Just Drag the Mailboxes files created in OST File format and Drop to Folder, you want to save in simply.

    Solution 2: Import & Export Technique to Convert File

    a) Open Outlook Application

    b) Click the File menu., then Select “Import and Export” Wizard.

    c) In Import and Export Wizard, click the “Export to a file” option and then click Next button

    d) Now select the Outlook Data File(.pst) and click Next to proceed further.

    e) No, you need to select the mailbox folder, you want to export from. You can also include the sub-folders. 

    f) Browse and select the target folder where you want to save the new PST file and click the Finish button.

    Solution 3: Automated Solution 

    In this Solution, if you have Offline or Orphan PST File then you can convert it into UNICODE PST file format supported by Outlook 2016 via SecuraSoft  OST to PST Converter and below version. If you OST File is corrupted, still tool has the capability to recover and Convert OST File into PST format. 

    Senin, 13 Agustus 2018 07.40
  • OST files can be accessed with the original profile which was used to create it, As you don't have access to original profile now you have to take help from some third party application.
    Senin, 08 Oktober 2018 10.00
  • You can try these following steps:

    1. Launch MS Outlook, choose File option.

    2. Now, select ‘Archive’ and choose the folder(s) or file(s).

    3. Find the location to save the Archive file(s) or folder(s).

    4. At last click on Finish.

    Senin, 08 Oktober 2018 11.10
  • Thanks to putting up Question 

    I suggest you try to ATS OST to PST Converter Software to Convert, unlimited OST files to Outlook PST file with restore cloud application as office365 & Live Exchange Server.

    This Software helps to use Software Restore OST file to... 

    • Outlook PST file.
    • Restore MSF File.
    • Restore EML file.
    • Restore MBOX file
    • Restore EMLX file
    • Restore vCal & vCard file.
    • Restore office365 * Live Exchange server.
    • Restore HTML file formats.

    Freeware Software available Download and freely Convert OST file to PST file.

    Senin, 22 Oktober 2018 07.29
  • Now no need to search how to convert OST to PST? just go on This OST to PST site and download free demo version of software and know how many features can you get if you use this OST to PST Converter software

    Visit at ;

    Senin, 26 November 2018 09.28
  • Advance OST to PST Converter Software has high-quality to fix OST file corruption problem and simply convert inaccessible OST file into MS Outlook PST file format along with complete mailbox items like as emails, deleted items, contacts, calendars, notes, draft, journals, meeting, and attachments etc. This software is very easily run all Windows OS and support all MS Outlook versions.

    Read more:

    Selasa, 04 Desember 2018 18.57
  • Hi Zakmk96,

    Need to import .ost data files into Outlook PST, then you should try OST Converter – a reliable and trusted solution to save OST files into PST file format with all items like emails, calendars, notes, contacts, tasks, email formatting, and attachments for Outlook 2019, 2016, 2013, including all below versions. If you have any doubt on my words, then you can check first its download edition that allows converting the first 20 items from OST to PST without any cost.

    Sabtu, 29 Desember 2018 06.13
  • Hi,

    You can not directly import orphan OST file in Outlook, you have to convert OST file into PST file to access or import data of OST into Outlook. You can perform conversion of OST to PST file with automated converter tool, so I would like to suggest you download & try this tool -

    Senin, 31 Desember 2018 07.17