How to open OST files in Outlook 365?

Last updated on January 6th, 2023 at 07:58 am

Are you worried about opening OST files in Outlook 365? So don’t worry, you should read this blog where we recommend the best method to solve your problem without losing any data.

OST files are exact copies of your mailboxes stored on Exchange Server. It allows the user to access the data in offline mode and synchronize it with the Exchange Server when connected.

But, nowadays due to the latest technology of Office 365 people want to transfer OST files to Outlook 365. We can understand the problems users are facing while importing .ost files in Outlook 365.

Easy way to open OST files in Outlook 365

We recommend that one of the best ways to open OST files in Outlook 365 is to use SysInspire OST to Office 365 Converter Software. This utility helps to import OST files with all mailbox items in Outlook 365 by following a few steps of this tool. It gives the best result for your issues and virus free from every virus. This tool has multiple features to ease the user’s work and help import OST files to Outlook 365 securely.

Multiple Features of SysInspire OST to Office 365 Converter Software

Graphical User Interface:- Users do not require any tech-based knowledge to operate the software as the utility comes with a simple graphical user interface. Technical and non-technical users efficiently operate the software without any requirement. 

Convert OST to Outlook 365 and other formats:- It quickly and securely imports single and bulks OST files with all mailbox items to Outlook 365 and a variety of other formats. This utility has 10+ formats for the conversion of OST files like PST, Gmail, Yahoo Mail, NSF, EML, EMLX, HTML, MSG, etc. 

Email filtering Option:- Using the email filtering option of this tool, users can convert emails from a specific date range.

Support Window OS and MS Outlook Versions:- This Utility supports all MS Outlook Versions and also users can smoothly operate the software in Windows OS versions up to 11. This utility is 100% safe and risk-free from every virus for your machine.

Technical support 24*7:- It offers 24*7 technical support for solving users’ problem-related software.

Free Demo version

SysInspire software always provides a free demo version for the users to know the performance of this tool. Where users can easily access and retrieve and import up to 25 items per folder of OST files to Outlook 365 without any cost.

Working Process of SysInspire OST to Office365 Converter Software

Step 1:- Download SysInspire OST to Office365 converter software,
            Then click on “Select OST file” button and select the OST file

Step 2:- Then the software show all recovered emails and other listed items

Step 3:- Then the user can see the preview of all data of OST file and select a required folder from OST file. Then click on “Import Cloud >> Import OST to Office365” button

Step 4:- Enter your Office 365 account email address and password in the software and apply mail filtering settings.

Step 5:- Finally press “Convert” button to start transferring OST file data to Office 365 account.


In this blog, we discuss the best third-party tools to sync OST files to Office 365. Try SysInspire OST to Office 365 Converter software which helps to open OST files in Outlook 365 and many other formats. Use its free demo version to learn about all its functions for free.

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