
The software allows you to convert OST files, including inaccessible and orphaned OST files, to PST format with 100% integrity. However, if Outlook profile is deleted or OST is inaccessible, it is suggested to use a reliable OST to PST converter software, such as Stellar Converter for OST. This will help you avoid data loss and restore the mail items if Outlook fails to recreate a new OST file. We’ve also mentioned a method to recover mailbox items from an inaccessible or orphaned OST file to PST and restore the mail items to your existing or new Outlook profile.īefore you remove the default OST file, export the mailbox items to PST via Outlook Import Export Wizard. In this guide, we’ve discussed steps to remove the default OST file.

This will create a new OST file and may fix the Outlook issues and errors. However, if you are receiving such errors or encountering Outlook performance issues, you can remove the default OST file. To avoid these errors and performance issues, it is critical to keep the OST file size under recommended limits.

With time and usage, the default OST file grows larger. The changes made are saved locally in the default OST file and are synchronized with the mailbox on the Exchange server as soon as the system connects to the internet. This allows users to open and access their mail items, such as emails, attachments, contacts, journals, etc., even when the system is offline. Microsoft Outlook uses Outlook data files, such as OST, to store a copy of mailbox items on local storage.
