
An OST file (Offline Storage Table) is a local copy of your mailbox stored on your computer. It allows you to access your email, calendar, and contacts offline and make changes that will sync with the Exchange server the next time you connect. If you are using Office 365, you can open an OST file by following these steps:
Here are the manual steps to Open OST files into Office 365 account:
- Access Outlook and navigate the "File" tab in the top left corner.
- From the "Account Information" section, click on the "Account Settings" button.
- From the "Account Settings" window, select the "Data Files" tab.
- Click the "Add" button to open the "Open Outlook Data File" window.
- Please navigate to the location of the OST file on your computer and select it.
- Click "Open" to add the OST file to Outlook.
Note: If the OST file is password-protected, you must enter the correct password of ost file before it opens.
Once you import the OST file to Outlook, you can access the email, calendar, and contacts stored in it, just like any other email account. You can also go for professional Regain OST to Office 365 Migration software. This tool not only imports OST to Office 365 and also help user to import offline OST files to MS Exchange Server without any data loss or corruption. It also maintains the hierarcy of email folders as well.
Keep in mind that any changes you make to the OST file will be synced with the Exchange server once you are connected to the Internet, and Outlook can sync with the server. If you want to know more about the detail guide. You read this blog post will surely help you. https://www.regainsoftware.com/blog/import-offline-ost-to-office-365/