What is ost file?
Generally, when you are connected with Microsoft Exchange Server account, all of your mail items such as emails, calendar, task, and other items are received and saved on server. You can create and a keep a local copy of it on your system by configuring Outlook. This file when created is named as .ost file known as offline Outlook Data File. It allows you to work offline when connection to Exchange Server is interrupted. The OST file so created is synchronized with the Exchange server when connection is re-established.
How OST file becomes inaccessible?
When ost file is created, an encryption key is generated which binds the file with the profile for which it is made. This encryption key protects OST file from being accessed by other profile. So, if in any case profile to which ost file belongs, is deleted then, user will not be able to access ost file. This will make OST file orphan. And when you will try to open orphan OST file, outlook will report an error. Thus making it inaccessible. Another main reason is OST file synchronization error. Many times during synchronization with exchange server, the process is interrupted which makes OST file damaged or corrupted. Other reasons such as virus intrusion, or file size issues may leads to inaccessibility of OST file in Outlook.
Solution to open OST file without Outlook
In any of the above cases ,Outlook prohibits user from accessing the ost file. There are many other reasons when Outlook reports error when you try to open ost file. What to do in such situations?. No worry, you can easily get access to orphan .ost file or even when, Outlook is not installed on your system. You can use third party software such as OST Viewer which is a free application and allows you to read OST file. It can open OST data files even without Outlook, and thus solves all error which are generated by Outlook to open file. This one tool facilitate multiple features. The key functions of software and several benefits you get using OST Viewer, are briefly described below:
Prime Features of OST Viewer
1. Read or Explore OST file without Outlook
it is an independent tool which runs without depending upon any email client such as Outlook. Therefore, you can access your offline outlook data files even when you don't have outlook installed on your computer system. The algorithms used to develop the software are powerful and robust, making it reliable to run on any Windows platform without MS Outlook.
2. Free tool to view OST file
It is totally free of cost tool, you can simply download the software and use it to open and read ost files. It can explore even orphan or corrupted OST files to which outlook reported error.
3. Preview Mail items & Attachments
You can easily view all mail items such as email messages, journals, task, calendars, even deleted items using OST Viewer free software. Attach files such as images and doc files can also be previewed in the same panel of the screen
There are several other features which allow you view offline outlook data files in a proper and complete way. The user interface are designed such as you don't require a technical assistance to use it. In just few simple steps you can get access to your .ost files.
How to view OST files Without Outlook ?
Mentioned below are steps to open and read OST files without outlook using OST Viewer freeware
Step 1. Download and install the software properly on your system
Step 2. Launch the application
Step 3. Click on Add file option on the top menu of the screen
Step 4. Select the .ost files that you want to open
Step 5. Click on the any folder to view its content
Step 6. Click on Preview Message/Attachments tab to view the selected email or item.
OST Viewer provides you the best solution to open OST files in cases when you don't have outlook installed or your Outlook reports error while opening the OST file. This software is totally free, there are no hidden cost or any extended pro plans which require heavy amount to be paid to use it. It is an effective tool that solves major problems of most of the Outlook users.