OST file format is used by Microsoft Outlook mailing software. The file can contain data such as email messages, tasks, calendar data or contacts. OST files are used as offline mailbox files if applications is not connected to Micr o soft Exchange server. OST format is also known as Offline Folder File (OFF).
OST is a offline folder file that enables user to perform certain tasks without the need of active internet connection – all changes made by the user will be synchr onized with Microsoft Exchange server upon connection. OST file enables creation of contacts, tasks, email messages and other elements while offline. This features is especially useful in places with limited internet access.
OST files is created immediately after choosing ‘Use offline folders’ option available in Microsoft Outlook utility. Upon generation, the file is stores on local hard disk drive, not on the mail server. OST file folder path:
OST format shares many similarites with PST, however the latter stores data on network cli e nt or server other than Exchange server. OST format supports larger file sizes than PST.
The following listing features OST-compatible programs. Files with OST suffix can be copied to any mobile device or system platform, but it may not be possible to open them properly on target system.
Problems with accessing OST may be due to various reasons. Fortunately, most common problems with OST files can be solved without in-depth IT knowledge, and most importantly, in a matter of minutes. We have prepared a listing of which will help you resolve your problems with OST files.
The main and most frequent cause precluding users form opening OST files is that no program that can handle OST files is installed on user’s system. The most obvious solution is to download and install Microsoft Outlook or one to the listed programs: Convert OST to PST, Outlook Recovery Toolbox, Advanced Exchange Recovery. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. One of the most risk-free method of downloading software is using links provided by official distributors. Visit Microsoft Outlook website and download the installer.
You still cannot access OST files although Microsoft Outlook is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. The reason that Microsoft Outlook cannot handle files with OST may be that the software is outdated. The most recent version of Microsoft Outlook is backward compatible and can handle file formats supported by older versions of the software.
If you have the latest version of Microsoft Outlook installed and the problem persists, select it as the default program to be used to manage OST on your device. The next step should pose no problems. The procedure is straightforward and largely system-independent
The procedure to change the default program in Windows
The procedure to change the default program in Mac OS
If you followed the instructions form the previous steps yet the issue is still not solved, you should verify the OST file in question. Problems with opening the file may arise due to various reasons.
If the file is infected, the malware that resides in the OST file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the OST file is indeed infected follow the instructions below.
If the OST file was sent to you by someone else, ask this person to resend the file to you. The file might have been copied erroneously and the data lost integrity, which precludes from accessing the file. It could happen the the download process of file with OST extension was interrupted and the file data is defective. Download the file again from the same source.
There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.
The operating systems may note enough free resources to run the application that support OST files. Close all running programs and try opening the OST file.
Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Outlook Offline Folder Format file. It is possible that one of the available system or driver updates may solve the problems with OST files affecting older versions of given software.
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