Imagine you need to migrate your on-premises Exchange organization to Office 365, and you have several purged mailboxes. The only way to migrate the data of those mailboxes is through their OST files, which is possible if you can open the OST and extract the data without Exchange. Stellar Converter for OST Technician edition converts such OST files and directly exports the mailbox data to Office 365.
It is common for an OST file to become very large with routine usage. You may want to convert such large OST files as well as extract the mail items in smaller files. Stellar Converter for OST Technician can convert OST files of any size and also split the output PST in smaller files in the size range of 1–50 GB. The tool preserves the original mailbox structure and data integrity in the resultant PST files.
You may need to extract the mail items from OST files if the users in your organization are changing over to new systems with new Outlook profiles. The users’ OST files in their legacy systems may have emails unsynchronized with Exchange mailbox. Stellar Converter for OST can convert such OST files in bulk to allow consolidation of the mailbox data.
Stellar OST to PST converter has worked wonders for Outlook 2003 to 2016 conversions of OST Files. This application I use and resort to.
Stellar Converter for OST helps admins extract all mailbox data such as emails, attachments, contacts, calendars, tasks, notes and journals from OST files, even if inaccessible for Outlook.
A brilliant piece of software provided by Stellar "Convert your offline OST to PST file with Stellar OST to PST Converter Tool to get back your Emails" can help you achieve this.
Stellar Converter for OST helps admins extract all mailbox data such as emails, attachments, contacts, calendars, tasks, notes and journals from OST files, even if inaccessible for Outlook, With this tool, we can easily convert any OST file to PST.
I have been using Stellar OST to PST converter since 2010 as an MSP provider using the Tech License and it has worked wonders for Outlook 2003 to 2016 conversions of OST Files.
Stellar Converter for OST Technician edition can convert large OST files and extract all the mailbox items such as emails, attachments, contacts, calendars, tasks, notes, journals, etc. with 100% precision. The software also extracts the deleted mail items from the OST file.
The Technician Edition can convert multiple OST files in a batch, allowing the user to extract the mailbox data in bulk. It allows the user to create and manage a batch file comprising the OST file details such as location, destination path, start & end date, etc. to facilitate the batch conversion of OST files.
The tool displays a detailed preview of the mail items after converting the OST file. The Preview window displays a list of all the Folders, Calendar, Notes, Journal, Tasks, etc. in the left pane. Clicking these items displays details such as email body text, embedded hyperlinks, etc.
Stellar Converter for OST Technician allows the user to save the converted mailbox data in multiple file formats, including PST, MSG, EML, RTF, HTML, PDF, DBX, and MBOX. This feature allows the flexibility to access the data through different applications such as browser, PDF reader, etc.
The software can split the output PST file as per the email ID, date range, or size. It allows the user to split the PST file in the sizes of 1–50 GB while maintaining the original mailbox structure and integrity of the data. The feature helps in improving the manageability of large mailboxes.
The advanced OST to PST converter tool can compact a large PST file and compress all attachments in a new PST. It can also extract, compress, and save attachments to a folder without losing the interlinking to access the attachments. The tool can also remove the attachments while saving the data in PST file.
The software can export the output PST file to a live Exchange Server. After converting the OST file into PST, select the “Export to Live Exchange Server” option, and enter the Admin user credentials and destination mailbox details to export the data to the live Exchange Server.
The Technician edition can also export the converted OST file to an Office 365 account. After converting the OST file into PST, select the “Export to Office 365” option, and enter the login ID and password to export the OST data to Office 365.
The software can save the OST file ‘scan’ data in a DAT file and allows to load it later to recommence the OST to PST conversion process. This option helps in performing the OST to PST conversion task at different times or on different machines.
Stellar OST conversion tool allows the user to export all the contacts stored in the Offline mailbox (OST file) to CSV file format. The user can open the CSV file in a spreadsheet application such as Microsoft Excel, and access and organize the saved contacts.
The software converts the OST file and allows the user to export the mailbox items to an existing Outlook profile. Aside from saving the data in a new PST file, this option helps the user to view the consolidated mailbox data through the existing Outlook profile.
Stellar OST PST converter tool provides an option to relink the compressed emails to their respective attachments saved in a separate folder. The tool provides an easy way to establish the links to attachments after converting and compacting the mailbox data in a PST file.
Step 1: Launch Stellar Converter for OST. Click Select Outlook OST in Home tab. A pop-up screen will appear with options to Browse or Find the OST file.
Step 2: Click Browse if you know the location of the OST. Or, click Find to search the OST. Next, Click Convert to initiate the OST to PST conversion.
Step 3: The software is converting the OST file. The estimated conversion time depends upon the size of the OST file.
Step 4: After converting the OST, the software previews the mailbox folders and deleted items. You can Browse and Select mailbox items.
Step 5: Choose the file format option to save the OST data or export it to Exchange, Office 365, or an existing Outlook profile. You can also split or compact the output PST file.
I realized a little too late that I only had the .OST version from a prior computer and needed the .PST in order to access some files from my new machine. Happily, I quickly found the "Stellar Converter for OST".
Stellar Data Recovery is impressive when it comes to any type of data recovery, the last experience made me go for Stellar once again to convert lost OST file to PST Using Stellar OST to PST Converter. I personally recommend this.
Karl Bickmore, CEO
My problem at the time was to recover an old but important Outlook file in order to retrieve the Contacts folder and older correspondence. It took three tries before I was able to successfully recover and retrieve what I wanted.
MS Outlook: Office 365, 2019, 2016, 2013, 2010, 2007
Technician & Toolkit
End User License Agreement
English, German, French, Italian, Spanish
Intel-compatible (x86, x64)
Windows 10, 8.1, 8, 7
4 GB minimum (8 GB recommended)
250 MB for installation files
The demo version of the software is for free evaluation and analysis. Using the demo version, you can scan the OST file (even a corrupt one), preview all mail items and save 20 items per folder. To save the converted file as PST, or to compress, or split before saving, you need to register for the full license.
Yes, you can export all contacts present in your OST file to CSV file but some important fields will be filled with 'Demo' string.
Please follow the following steps, if you are facing the problem.
How to view a Newly Created PST File
To view a newly created PST file with the software, you can either import the PST file in MS Outlook or follow the steps mentioned below.
Yes, with Technician version, you can convert over-sized OST files. The good thing with the software is that you have the option to split the converted over-sized file at the time of saving it.
The time to scan the OST file depends primarily upon its size. You can view the progress bar during scanning that indicates that the process is going on. After the process is over you will get a message - 'Scanning of selected OST file completed'.
To locate and access the contacts; first, you need to import the new PST file to MS Outlook. Then follow the steps mentioned below.
Yes, you can view and save the entire Log of the process followed during the software run. Follow the steps mentioned below.