Do you have this question in mind How to open OST files in Outlook 365? If yes, then you donβt need to worry. In this blog, we have written an automated method to migrate OST files to Outlook 365.
Overview
OST(Offline storage table) files are Outlook files that are created when the connection between the Exchange server is disconnected. When the connection between the Exchange server is established with the help of the Internet, the OST also syncs with the Exchange server. There is no direct way to open OST files in Outlook 365. You must use a third-party application to open OST files in Outlook 365.
Reasons to open OST files in Outlook 365
- Deletion of Files on the server: Sometimes email files on the exchange server deleted accidentally. OST files on Outlook become orphaned and are inaccessible to the user.
- Crash down of Exchange server: Sometimes because of virus attacks and malicious activity exchange server crashes and OST files cannot get synchronized with the Exchange server and become inaccessible.
Best software to open OST files in Outlook 365
The best software to open OST files in Outlook365 is eSoftTools OST to Office 365 Converter. This is the most advanced and reliable software to open OST files in Outlook 365.
Key features
- This software can migrate single and multiple OST files to Outlook 365 at a time.
- In the preview panel, you can see all the emails and inner files of the OST file.
- You can migrate the OST files to Outlook 365 without the dependency on MS Outlook.
- With this software, you can convert and import OST files to EML, EMLX, MBOX, MSG, HTML, ICS, VCF, Office 365, Yahoo Mail, etc.
- It maintains data integrity and data formatting in the migration process.
- It maintains the meta properties of emails( To, Cc, Bcc, From, Subject), migrating OST files to Office 365.
- It provides the feature of email filtering by Date by giving a Date range(From and To).
- It successfully imports OST files to Office 365 with all Outlook editions Outlook 2019, 2016, 2013, 2010, 2007 and 2003.
Steps to migrate OST files to Outlook 365
- Download and install eSoftTools OST to Office 365 Converter software into your system.
- Select the option
- Single OST File Conversion– Upload a Single OST file into software at a time.
- Multiple OST File Conversion– Upload single and multiple OST files into software at a time.

- Import OST and press the βstart scanningβ button.
- In the software’s panel, you can get a Preview of OST files and select the files and folders of the OST file you want to convert.

- Choose the files and folders and Press the βOST to Office to 365β convert button.
- Enter the email address and password in the Office 365 account and select options for import and filtering.

- Press the β Convertβ button and start the conversion process.
Conclusion
In this blog, we have explained the eSoftTools OST to Office 365 Converter automated method to open OST files to Outlook 365. There are manual methods available that are complex. The automated method is easy to use and without any data loss, you can migrate OST files to Office 365.
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