
An Offline Outlook data folder (.OST) is created at a predetermined place when you open an Exchange, IMAP, or Outlook.com account in Microsoft Outlook on Windows. This Offline Outlook data file (OST) retains a local duplicate of the mailbox items saved on the server. For this reason, you may view emails and complete outstanding chores even when the system is offline or not online.
Reasons To Switch from OST files to PST
Furthermore, an inaccessible OST folder may result from synchronization errors between the Exchange Server and the OST file. This usually occurs as a result of a crash or dismount of the Exchange Server or database housing your mailbox. Sudden power outages, Outlook or system breakdowns, virus or malware invasions, and other issues might potentially harm the Outlook OST file.
Automated Solution — DataVare OST to PST Converter
In any of these situations, you can use OST to PST converter software, such as Offline OST to PST Converter, to retrieve your mail items from inaccessible or orphaned OST files and save them to an Outlook PST file. With the program, you may immediately move mailbox contents from inaccessible, degraded, or orphaned OST files to PST files. These things include emails, attachments, contacts, notes, tasks, journals, and more. With the aid of the online OST to PST converter, you can quickly complete the task without Microsoft’s email client Outlook on any platform.
The OST file, however, goes into an inaccessible unsecure condition when a user mailbox is destroyed or removed from the server. Since an OST file has been encoded with a MAPI EntryID GUID, it cannot be opened or imported into another Outlook account, unlike PST Outlook data folders.
Concerning Offline OST to PST Conversion
With a few clicks, you can get your mailbox items into Outlook or a Microsoft Exchange account with Offline OST to PST Converter, as there are no traditional techniques for extracting mailbox items from an unavailable Outlook OST file. Installing Offline OST to PST Converter on a Windows computer that satisfies the minimal system requirements is necessary to convert OST file to PST or another desired format.

You can review the test and standard test of the best OST to PST converter program on a number of aspects, including speed, precision, accuracy, and reliability, to learn more about offline OST to PST converter and how it performs.
Conclusion
Even though the Offline Outlook OST file is safe and robust, unexpected system shutdowns, Outlook crashes, and other events might still harm it. Furthermore, the OST file may become orphaned and unusable if the mailbox is erased from Exchange or the mail server, or if the profile is destroyed. OST files cannot be read or imported into any Outlook profile because they are encrypted and need permission from the associated MAPI profile.
This is why accessing, opening, and converting the mailbox contents from unavailable or orphaned OST files to Outlook editable PST format requires the use of a secure DataVare OST to PST Converter. The program is suggested as it extracts all data with 100% accuracy and converts OST to PST more quickly.