Offline OST to PST Converter

Offline OST to PST Converter

OST to PST Converter for Local Work with Outlook Files

An OST file is an Outlook offline storage file created when working with Microsoft Exchange Server, Microsoft 365, Outlook.com, IMAP/Exchange accounts, and caching mode. Typically, an OST file is tied to a specific email profile, account, and computer. Therefore, you cannot simply copy it and open it in another Outlook instance like a regular PST file.

The OST to PST Converter solves this problem: the program reads the contents of the OST file, displays the found folders and mailbox items, and then saves the data in PST format. After that, the PST file can be connected to Outlook and used as a regular email archive.

OST to PST Converter is suitable for situations where you need to:

• convert OST to PST after deleting an Exchange account;
• open an old OST file without access to the original Outlook profile;
• transfer emails from OST to a new Microsoft Outlook;
• extract emails, attachments, contacts, calendar, tasks, and notes;
• restore access to data after an Outlook, Windows, or email profile failure;
• save data from an OST file to PST, MSG, EML, VCF, or TXT;
• work with a large OST file locally, without uploading data to a website.

How to convert an OST file to PST locally on your computer

A step-by step description of converting an OST file of any version and size to a Microsoft Outlook PST file using a personal computer:

Once the program has finished running, you will receive a PST file. You can open it in Microsoft Outlook via the menu:

File → Open & Export → Open Outlook Data File

This allows you to transfer data from an OST file to Outlook without reconnecting to your old Exchange Server or account.

How to Open an OST File Without Outlook

If Outlook isn’t installed, won’t launch, or can’t recognize your old profile, you can still open the OST file for viewing in Offline OST to PST Converter. The program analyzes the file’s structure and displays the mailbox contents within its own interface.

You can view:

• email folders;
• inbox and sent items;
• deleted items;
• drafts;
• attachments;
• contacts;
• calendar;
• tasks;
• notes.

This is useful if you need to quickly check the contents of an OST file, find a specific email, verify that the file is readable, or select only certain folders for export.

How to Transfer Data from an OST File to Microsoft Outlook

To transfer data from an OST file to Microsoft Outlook, you must first convert the OST to a PST file. This is because Outlook does not open arbitrary OST files as portable archives. An OST file is typically associated with a specific profile, while a PST file is designed for storing and transferring Outlook data.

After conversion, follow these steps:

1. Open Microsoft Outlook.
2. Go to the File menu.
3. Select Open & Export.
4. Click Open Outlook Data File.
5. Select the PST file created in Offline OST to PST Converter.
6. Open the file and check the folders, emails, contacts, and calendar.

Once connected, the PST file will appear in Outlook as a separate data store. You will be able to view emails, search for messages, copy folders, move items to another mailbox, or use the PST as a local archive.

What Can Be Extracted from an OST File

The program helps transfer key Microsoft Outlook data to PST:

• emails;
• mail folders;
• attachments;
• contacts;
• calendar;
• appointments and events;
• tasks;
• notes;
• deleted items, if they are available in the OST file structure.

In addition to PST, data can be saved in other formats:

• MSG — for individual Outlook messages;
• EML — for opening emails in email clients that support EML;
• VCF — for saving contacts in vCard format;
• TXT — for text data and notes.

Functionality and capabilities of the Offline OST to PST Converter

• Does not require Internet access
• Conversion of OST files in UNICODE format (Outlook 2007 or higher)
• Reading of password-protected *.OST files
• Does not require authentication by a Microsoft Exchange Server
• Converts OST files of any size
• Ability to preview the contents of an OST file
• Conversion of OST files in ANSI format (Outlook 97...2003)
• Conversion of damaged OST files
• Reading and conversion of encrypted OST files
• Does not require authentication by Windows Domain Controller
• Selective conversion of data: the user can select the data to be converted into an OST file

The ost pst conversion tool allows you to convert data from *.OST files into the following formats:

• PST files (Microsoft Outlook)
• MSG files (Microsoft Exchange Server, Microsoft Outlook, and other programs)
• EML files (Microsoft Outlook Express, Live Mail, and other email programs)
• VCF files (RFS822, vCard, Business Card Format, the contact storage format used by most personal information managers (PIM))
• TXT files (text files that can be opened with Notes)

When You Need to Convert OST to PST

The Offline OST to PST Converter can come in handy in various situations:

• Outlook won’t open the OST file;
• an old Outlook email profile has been deleted or is corrupted;
• Exchange Server is no longer available;
• a Microsoft 365 account has been disabled;
• you need to transfer emails to a new computer;
• you need to open an OST file without syncing to the server;
• only the OST file remains after a Windows crash;
• you need to create a PST archive from an old mailbox;
• you need to extract emails and attachments from a corrupted OST file;
• you need to save Outlook data before migrating or reinstalling the system.

Offline OST to PST Converter for Windows

The tool is designed to run on a local computer or Windows server. It supports OST files from various versions of Microsoft Outlook, including both old and new Outlook data store formats.

Offline OST to PST Converter can work with:

• Microsoft Outlook OST files;
• Exchange offline storage;
• Outlook files after a mail profile failure;
• OST files after replacing a computer or Windows user;
• large mail archives;
• corrupted OST files, provided the data is readable;
• files that cannot be opened using standard Outlook tools.

Notes:

• In order to convert OST files that are larger than 4GB, you must have the 64-bit version of Microsoft Outlook installed on your computer with Microsoft Outlook OST PST Converter.
• You must have Microsoft Outlook installed on your computer in order to export data to a PST file. Outlook in Office 365, Outlook for iOS, and Outlook for MacOS do not allow you to export data to a PST file.
• You cannot export groups of contacts from OST to PST files.