An OST (Outlook offline folder) is the local storage file of MS Outlook that makes it possible for the user to work offline when configured to Exchange Server. Once the application sets up a secure connection with Exchange Server, the OST file synchronizes the changes that it finds with the corresponding mailbox. The OST is unusable and inaccessible without synchronization being properly done with mailbox, after which the file converts into application-readable PST.
At times, the instances like, deletion of user mailbox, changes in Exchange profile, and database crash result into an orphaned OST. If the OST fails to synchronize with the Exchange Server or gets corrupt, all the mails, journals, notes, contacts etc. become inaccessible. In such cases, you need to convert the unusable OST to usable PST.
Stellar Phoenix Mailbox Exchange Desktop is a reliable and powerful OST to PST solution that can convert an Outlook OST to a directly-importable PST. The OST PST Converter uses high-end scanning algorithms that safely extract the inaccessible file objects into a form that can be directly used and accessed.
To convert OST to PST file format, you need to follow these steps:
You can select the file from a pre-known location using 'Select Outlook File' option or search it in any drive or folder using 'Find Outlook File' option. The options are available at initial 'Select Outlook Data File' window:

After the affected OST is selected, you need to click 'Start', which begins scanning the process.

After the software scans the file, you need to define the desired destination path or you can choose the default root location:

The software restores the converted PST at the specified location with original nam, but suffixed with the word 'Converted':


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