If you delete a user mailbox from Exchange and there is no backup, the only way to access the mailbox data is through the OST file. However, you cannot recreate or rebuild OST file if the Exchange user account is deleted from Active Directory. Stellar OST converter tool converts the inaccessible OST file and extracts the mailbox items in a PST file.
Consider that you are upgrading your Exchange organization and need to migrate a large number of mailboxes, including the deleted mailboxes. If you do not have a local backup of the deleted mailboxes, the only way is to extract the data from the OST. The Stellar tool can convert OST to PST and extract the complete mailbox data.
If you are planning to shift your physical location and need to recreate the OST file without Exchange mailbox backup, then the only way is to extract data from the OST file. Stellar OST converter tool can easily recreate & convert the disconnected or legacy OST files to extract the mailbox data in portable file formats such as PST or export it to Live Exchange or Office 365.
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 has rigorously tested the tool for converting very large-sized OST files. The tool converts the large OST file in situations when Microsoft Outlook or Exchange Server is crashed or facing a disaster, or Outlook is facing synchronization issues. It converts the OST file efficiently and extracts the data with 100% precision.
The OST to PST converter by Stellar extracts the emails, attachments, contacts, calendars, tasks, notes, journals, etc. The software can also extract the deleted mail items from the offline data file (OST). It is the best solution for any situation that needs the user to move the OST file to PST and extract the mailbox data from the OST file.
The software displays a detailed preview of the mailbox items stored in the converted OST file. The user can click a folder, email, calendar, or other mailbox items listed in the Preview pane to view its contents. The Preview feature helps in identifying and extracting the specific items from the offline data file (OST).
A user may face an error when trying to open an encrypted OST file, leading to loss of access to the mailbox data. Converting the encrypted OST file to PST file can solve this problem. The OST to PST converter by Stellar converts the encrypted OST to PST, thus allowing access to the mailbox data.
The OST to PST conversion tool allows the user to extract the mailbox data in different file formats such as PST, MSG, EML, RTF, HTML, or PDF. This feature allows the user to view the mailbox contents in applications such as Outlook, web browser, PDF reader, text reader, etc.
The OST PST Converter software extracts mailbox data in an organized manner while maintaining the original arrangement of mail items. Once the OST scanning is completed, the software allows sorting and organizing of the emails by Date, From, To, Subject, Type, Attachment, Importance, etc.
The tool allows free OST file to PST file conversion and extracts 20 emails per folder. Use the free OST to PST converter to scan the OST file. After scanning the Outlook OST file, preview the converted OST file and extract the mail items in a PST by clicking the ‘Save converted file’ button.
The OST PST converter tool allows the user to save the OST file ‘scan’ information as a DAT file and load it later to continue the conversion. This feature helps in splitting the OST to PST conversion process in two stages, doable at different times or on different systems.
The tool can convert multiple OST files into PSTs through a single batch process. This feature is helpful when an organization is moving to a new email service and needs to extract mailbox data from several OST files. The Batch Conversion feature is available in Technician Edition.
The software can directly export the OST to PST converted files to Office 365. It allows the user to login to an Office 365 account and exports the mailboxes directly through its interface. The OST to Office 365 migration feature is available in Technician Edition of the software.
Technician edition of the software can split a PST file by Size, Date, Email ID, and Folder. The tool offers to split the PST file in the sizes of 1-50 GB while preserving the original organization of the mailbox data. The feature helps in improving the manageability of large PST files.
Technician edition of the software can compact a PST file by compressing all the attachments in a PST file or extracting and saving the attachments in a folder. It can also extract, compress, and save the attachments in a folder while preserving interlinks through the PST file.
Convert OST to PST and extract all mailbox items
Convert multiple OST files and export to Exchange or Office 365
All features of Technician + 7 more tools
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.
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
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".
MS Outlook: Office 365, 2019, 2016, 2013, 2010, 2007
Corporate, 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
Following these steps to converting an OST file into PST file by using the software:
The Demo version of the software converts the Outlook OST file and previews the complete mailbox data. It also allows you to extract and save up to 20 items per folder.
Yes, Stellar Converter for OST allows you to search for the OST files stored in any folder, sub-folder, or drive in your system. Use 'Find Outlook File' feature of the software to locate the OST files.
You would need to convert an OST file into PST file in any of the following cases:
Or facing an error while accessing OST file –
The total time for converting an OST file into a PST file depends upon the OST file size. Stellar Converter for OST takes approx. Seven minutes to convert per GB of OST file into PST.
Follow these steps to import a PST file in Outlook:
The software can save the converted OST file into MSG, EML, PDF, RTF, or HTML file formats.
The software does not perform any action on the corrupted OST file. It converts the corrupt OST file in PST file, thus enabling access to the OST file data.
If you face any problem during or after an OST file conversion, you can contact the Stellar support team: firstname.lastname@example.org
The software is available in two variants – Corporate & Technician. If you only need to convert an OST file into PST file, then you should go for Corporate. If you want to convert and also compact or split a PST file, then you should use the Technician edition. The Technician edition can also export the OST file data to Office 365.
You can easily take backup of your Exchange data by converting the OST file to PST file format.
Yes, the software converts OST file that is not connected to Exchange Server.
Yes, the software guarantees OST to PST file conversion; however, we strongly recommend trying the free Demo version of the software which previews the mailbox data stored in OST and also converts up to 20 mailbox items per folder. After ascertaining the software effectiveness, you can activate it with a license key and then convert & save all mailbox items in PST or other file formats.
Yes, you can open the converted OST on another system after saving the OST file in a format such as PST, EML, RTF, or other supported file formats.