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How to Repair an OST file in Outlook 365?

OST is a default storage file of Microsoft Outlook. The file is vulnerable to corruption because of virus attack, unexpected power failure, poor network connection, storage media failure, or due to incompatible Outlook plugin, hence the user needs to repair an OST file in Outlook using

Here, we will discuss both of them in detail.

Most Recommended tool to Repair Outlook OST file

  • SysInspire OST Recovery software helps to make recovery of OST items with maintaining the data and folders structure.
  • During the time of conversion, the users can split large PST files into smaller files.
  • The software is compatible with all versions of Microsoft Outlook.
  • The software has a mail filter option where the user can make the recovery and conversion of email by date selection.

Manual method to Repair OST file in Outlook 365

Method 1- Delete the OST file and recreate the profile

  • Click and start the control panel.
  • Press the user account and therein press the show profile button.
  • All the profiles will be displayed in front of you; select the profile you wish to use.
  • Go to the property button therein select mail-set up the option of the desired profile. Click on the data file tab.
  • Select the account and press the open file location tab.
  • Close mail set up button.
  • Select the profile where you are facing a challenge and now delete it.
  • Now Restart Outlook to create a new OST.

Method 2- Repair OST file via ScanPST.exe

This recovery tool helps users to resolve the technical issues related to corruption of OST files. It is a simple to use tool and is also known as Outlook Inbox repair tool.

  • Open Windows Explorer and type the command “C:\Program Files (x86)\Microsoft Office\root\Office16” in the address bar.
  • Start the scanpst.exe, now find out the OST file that you desire to repair.
  • After scanning, the tool will start repairing the files.
  • Once it is done, it will show the notification, and the file has been repaired.

Automated Solution to Resolve OST file corruption errors

To get rid of all OST file corruption errors simply utilize SysInspire OST to PST Recovery software. It not only repairs the corrupt OST files but also authorizes users to recover accidentally deleted items from OST without disturbing their properties.  The user can repair the Outlook OST files and convert them into different formats like HTML, vCard, MSG, EML, Office 365, etc. The software will scan the files are repair them in a few clicks.

Working process to Repair OST file in Outlook 365

  • Install and Launch this SysInspire OST Recovery Tool in your Machine.
  • Click on Select OST button from the toolbar
  • After that hit on the “Select OST file” to get the corrupt OST file from its location and then click “Start Scanning”
  • Now the software will automatically recover or load all mailbox items of corrupt OST files.
  • Choose the required items and click on Save OST to convert the OST file into another file format.
  • Select the desired file formats and convert OST file easily
  • If you want to Export OST to Office 365 then click on the Export to Office 365 option.
  • Fill the login details of your Office 365 account then click on Convert and simply Export OST items to Outlook 365 Cloud


SysInspire offers a great way to repair and recover OST file in Outlook 365 without any technical hiccup. You can download this software now. The free demo version is also available that will guide you regarding the functionality of the software.

About SysInspire

SysInspire Software always designed product to help clients relating to Email Conversion, Data Migration, Forensic Tool and many more..

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  • support[@]sysinspire [dot] com