This is asked often as while most IT admins are familiar with Offline Storage Table or OST files, they are also aware of the fact that there is no way to directly access the contents within an OST file. Unlike PST files OST files cannot be opened in Outlook directly. Thus, on closer examination the often-asked question “how to open OST file?” seems not so trivial Afterall.
The lack of native support for opening OST files is what forces many a people to look for answers to how to open OST file. This is huge issue as often times OST files, which are copy of your Exchange mailbox, contain important data. While It is true that all the changes you make to while working offline are saved in the OST files and later synced when connection to server is live, it is also possible that any hardware issues, synchronisation issues resulting from connectivity problems or even sudden unexpected closure of Outlook can lead to a corrupted OST file and render it completely useless.
To retrieve the information in all such scenarios, you can convert them into PST files. The PST files unlike OST can easily be imported into Outlook and thereby data within accessed. Conversion of OST to PST is rather easy thanks to professional tool like EdbMails OST to PST Converter. EdbMails can also migrate OST data reliably over to Office 365 tenant or Live Exchange Server for you.
Most important of all, with EdbMails you can view all the contents of your OST file in just a few clicks. EdbMails has an easy to understand user interface that even a non-technical person can seamlessly work with and use to open and view OST contents. EdbMails will list all the OST contents in a hierarchical fashion within its interface making it easy for you to find what you are looking for and convert individual items of your choice to PST if need be.
EdbMails has a free to try demo version that lets you export up to 30 items and also test out all the features. In conclusion the best answer one can give to someone searching for answers to how to open OST file is to use EdbMails.