How to Rebuild an OST File in Outlook

Rebuilding OST file requires deleting and then recreating the same for ensuring continuity of communication activities. If the OST file gets corrupted due to known or unknown reasons, it can either be recreated or recovered to gain access to the lost data. The procedure to rebuild an OST file in Outlook distinct versions is mentioned herein.

Steps for Deleting an OST File


  • Exit Outlook application.
  • Go to 'Start' menu and then select 'Run'.



  • The 'Run' box will appear, in the 'Open' text box type:

    "%LOCALAPPDATA%\Microsoft\Outlook\"



  • Explorer window will appear with the list of Outlook files. Locate the OST file that needs to be deleted.
  • Delete the file by following either of the given alternatives:

    • Click on the file and then press the 'Delete' button from the keyboard.
    • Select the file and select 'Delete' option available within 'Organize' option in Windows Explorer.


Process of Re-creating an OST File

In the upcoming section we will discuss the detailed process of re-creating OST file in distinct editions of Microsoft Outlook. We will elaborate the steps for rebuilding OST file separately for each version of Outlook. Click on the specific link to redirect towards required procedure.



How to Recreate OST File in Outlook 2007


  • In the MS Outlook application, open 'Tools' menu.



  • In the options available under 'Tool' menu, go to 'Account Settings'.



  • In the Account Settings window double-click on 'Microsoft Exchange'. (Step - 3)



  • 'Change E-mail Account' window will appear, click on 'More Settings' button.



  • In the then appeared window, click on the 'Advanced' tab.



  • Click on 'Offline Folder File Settings' and then in 'File' box, type the accurate path of the file that is required to set as OST file.



  • Then click on the 'OK' button.
  • Default name for the OST file is set as 'Outlook.ost'. If the file with same name already exists, you might prompt for renaming.
  • Click on the 'OK' button and then click 'Finish'.

How to Recreate OST File in Outlook 2010 & Outlook 2013


  • In MS Outlook application click on the file tab available on ribbon.



  • Then select 'Info' and click on 'Account Settings' option available in the right pane.



  • Further, Go to Step 3 and repeat it till Step 9 as mentioned for MS Outlook 2007.

How to Create An OST File in Outlook 2003 & Outlook 2002


  • From main menu bar, select 'Tools' and then click on the 'E-mail Accounts'



  • Select 'View or change existing mail accounts' and then click on the 'Next' button.



  • Next, click on 'Microsoft Exchange Server' in the box associated to 'Outlook processes email for these accounts in the following order' and next click on the 'Change' button.



  • Further, click on 'More Settings' box and then select 'Advanced' tab.
  • Select 'Offline Folder File Settings'.
  • Afterwards, type the source path of the desired file that needs to be set as OST in 'File' box. Default name of the file will be 'Outlook.ost' and this requires to be reset as per requirement.
  • Click on the 'OK' button; click on 'Next' and finally click on 'Finish'.

How to Repair OST File » Check Outlook Exchange Connection

After recreating OST file under different Microsoft Outlook versions, we need to check the synchronization status between Outlook and Exchange via OST Integrity checker. Distinct steps are elaborated for repairing OST file according to Outlook editions.



In a recent update from Microsoft, it recommends that for repairing OST, delete the file and then re-download it from Server.


In case, if the OST is not synched with Server and contains local data, then it is suggested to export OST to PST and then delete the existing OST file. Later this PST can be exported to OST. If any duplicate data exists, it can be excluded from the file during export.


Following procedure can be implemented to convert OST to PST:


How to Repair OST File in Outlook 2013 & Outlook 2010


  • Go to 'File' tab, click on 'Open' and then select on 'Import'.



  • In the then appeared window, click on 'Import from another program or file' and click 'Next'.



  • Select the option 'Outlook Data File (.pst)', and then select 'Next'.



  • Click on the 'Browse' button and locate the file.



  • Select an appropriate option among the given alternatives and select 'Next'.



  • Select the destination folder to store the file and click 'Next'.
  • Next, click on 'Finish'

ScanPST.exe can still be used to check the logical as well as physical inconsistencies among OST files. But the 'Inbox Repair Tool' might take longer for scanning the Offline Storage folders.


Note: It is highly recommended to backup OST files before executing any of the given procedures.


How to Repair OST File in Outlook 2007


  • Exit Outlook and Open SCANOST by following the given path:

    "C:\Program Files\Microsoft Office\Office12"

  • Here, if Outlook application is opened, it will prompt to close it for proceeding further:



  • In 'Profile Name' select the appropriate profile within which the OST exists.
  • If it prompts and ask you to 'Work Offline'; or 'Connect', select 'Connect'.
  • Select the appropriate options and then click on 'Begin Scan'.

Alternate Solution to Repair MS Outlook OST

In earlier versions of MS Outlook application, ScanOST.exe is available to check the inconsistencies and error among OST files but it is only recommended for lower level corruption. In the recent versions, this utility is not available and scanning OST files using ScanPST.exe takes longer than expected. Therefore, the Offline Storage Tables can be recovered by using extraneous Exchange OST to PST Recovery tool that helps recuperating all healthy data presented in the OST and export the file to PST format.


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