HOW TOopen and view OST file?

Open and view complete data from orphaned OST files using the OST Viewer tool. With its easy-to-use interface, you can access the OST file data in three steps:

Add single or multiple OST files from the system location.
Use the Search option to browse all OST files from the selected drive.
Select any file item from the OST mailbox and view its data.

Explore software’s key capabilities

Discover the various essential features embedded in the OST viewer software, enabling a thorough preview of diverse OST files with efficiency and ease.

Access OST files without Exchange Server

Access OST files without Exchange Server Access Exchange Offline folders (OST) files without connecting to MS Exchange Server using the OST Viewer tool. The tool scans and displays the complete content of the OST file, including emails, calendar items, notes, and contacts.

Find and Open Emails

Find and open emails Utilize the software’s integrated 'Find' option to locate specific email items within selected mailbox folders quickly. Filter emails by various criteria such as From, To, Subject, Date Range, Attachments, etc., enabling easy preview of specific emails.

Saves Email List in HTML

Saves email list in HTML Save the selected emails from OST files in HTML format, preserving the email body for offline access. Verify related attachments for each email along with its message body.

Opens All Kinds of OST Files

Opens all kinds of OST files Open orphaned, inaccessible, or corrupt OST files with the OST Viewer tool. The software is well-prepared to open OST files without the need to connect to an Exchange profile, ensuring accessibility and convenience.

Search OST Files

Search OST files Simplify the process of finding OST files with the Search option in the tool. Enter the drive location, and the OST viewer tool automatically fetches and opens the OST file within the specified location, making the process effortless with just a click.

Open Multiple OST Files

Open multiple OST files Open an unlimited number of OST files effortlessly. Use the "+" button in the Source File Selection dialogue box to add multiple OST files simultaneously, saving users time from the tedious task of adding each file individually.

Generates File Analysis Report

Generates file analysis report Generate comprehensive and precise file analysis reports with the OST Viewer tool detailing various item types, including emails, contacts, and email flow density by sender or date. These analysis reports offer valuable insights into the previewed OST file.

High Software Compatibility

High software compatibility Supporting all versions of MS Exchange Server (2019, 2016, 2013, 2010, and earlier versions) and MS Outlook (Office 365, 2021, 2019, 2016, and earlier versions), the software ensures compatibility with a wide range of email environments.

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What is an OST file?

An OST file, or Offline Storage Table, serves as an offline copy of an Exchange mailbox. It allows offline access and modifications, with automatic synchronization to the Exchange Server upon reconnection.

Where is the OST file located? You can locate the OST file without accessing Outlook or Exchange through two methods:

Searching at the default location

At the default location You can find the OST file at this default location- C:\Users\user\AppData\Local\Microsoft\Outlook Or C:\Documents and Settings\\Local Settings\Application Data\Microsoft\Outlook

Search option

With OST Viewer tool 'Search' feature The OST Viewer tool simplifies finding OST files. To perform this, enter the drive location and click "Search," it automatically extracts all stored OST files, streamlining the process. This convenient feature ensures users can easily locate and access their OST files.

Why to use Kernel OST Viewer?

Open OST mailbox items without Exchange profile/connection.

  • View orphan, corrupt, and healthy OST files without Outlook.
  • View email data by Date, From, To, etc.
  • View attachments of OST file emails.
  • Save the OST email list in HTML format.
  • View analytical reports on OST file content.
Frequently asked questions
Simplify the process of viewing inaccessible, damaged, or corrupted OST files in just a few steps:
  1. Start the software, click the Browse button to select a single or multiple OST file(s), and click Next to proceed.
  2. Review the process information and click "Finish."
  3. In the next step, click on the files you want to view. Select them individually to explore their content.

Note: You can also generate an analysis report by choosing the report type from the right corner of the screen.

When configuring an Office 365 account in Outlook using IMAP, the remaining data is stored as a copy of mailboxes in an OST file. This process ensures that the configured Office 365 data is included in the local OST file.

An OST file serves as an offline copy of the Exchange mailbox. To access the OST file with the latest information, synchronize it with Exchange. The term "orphaned OST file" applies when the mailbox is permanently unavailable on the Exchange Server.

Yes, the software allows you to view the attachments in the OST emails. Follow these steps:

  1. Select the folder from the left pane.
  2. In the right pane, choose the email containing the attachment.
  3. Double-click on the attachment in the email preview to open it.

Easily locate and open your OST file with the OST Viewer tool using the 'Search' option. Specify the drive location for quick access.

The File Analysis Reports feature provides comprehensive insights into OST file content. It includes:

  1. Total item types: Graphical representation of item types vs. item count.
  2. Mail flow density by date: Graph showing item count vs. date.
  3. Mail flow density by senders: Graph depicting item count vs. senders.
  4. Interaction between users: Graph illustrating item count against sender and receiver pairs.

Software Prerequisites & recommendations

About SoftwareAbout Software

Version: 21.1

Release Date: Jan 2021

License Type: Free

Version SupportVersion Support

MS Outlook: Office 365, 2021, 2019, 2016, 2013, 2010, 2007, 2003, 2002, 2000, 98, and 97

System RequirementsSystem Requirements

Hard Disk: 50 MB of disk space

Memory: 64 MB RAM (128 MB Recommended)

Processor: Intel® Pentium Processor compatible (x86, x64) or equivalent

Operating System: Windows 365, 11, 10, 8.1, 8, 7, Vista, XP, 2000, 98, NT, 95

What customers say about Kernel OST Viewer
rating5 (4.9 / 5) 545 Reviews
It eliminates the need to open each email separately to view attachments

The option to preview attachments directly within the OST viewer is fantastic! And the fact that it doesn't require Outlook to open and view OST files makes accessing emails offline really easy.

Kimberly Hughes
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