Note: Back up the OST file before performing these steps. To recreate a new OST file, you can move, delete, or change the current OST file extension. This will open a new File Explorer window displaying the OST file.
The OST file location varies based on the Outlook and Windows version you are using on your system. To recreate the OST file in Microsoft Outlook, you need to first locate the OST file. Recreate Offline Data File (OST) in Outlook 2019, 2016, 2013, and 2010īased on the Outlook version, follow these steps to rebuild OST file in Microsoft Outlook. You can refer to this article to repair corrupt OST files.
Reasons Behind Inaccessible, Orphaned, or Damaged OST File Then restore the mailbox items by importing the converted PST into your new OST file via Outlook Import Export wizard. If you find some mail items missing from the new OST file after synchronization is complete, you can convert your inaccessible OST file to PST format. After recreating the OST file, you can check the emails. Thus, it requires a systematic approach to recreate OST file and avoid a data loss situation.Īn instant solution is to use a reliable OST to PST converter software, such as Stellar Converter for OST. As a result, synchronization stops and Outlook displays error messages.Īlthough this can be fixed by recreating or rebuilding a new OST file, it often results in missing mail items and data loss as some items may not have synchronized with the mailbox on the email server. When OST becomes inaccessible, Outlook stops working as it can’t access or read the OST file. However, the OST file is prone to damage due to various events, such as system crash. The OST file synchronizes the changes with the mail server once the internet connection is restored. When Outlook is set up using an Exchange,, Office 365 or IMAP account, it creates an Offline OST file that allows you to access Outlook and make changes even when the system is offline. Offline Folder or OST is an Outlook data file used to store a local synchronized copy of mailbox items, such as emails, contacts, attachments, calendars etc.