The OST to PST Converter by MailsDaddy provides reliable recovery of OST files and allows exporting data into PST, MSG, MBOX, EML, HTML, and RTF formats with 100% accuracy. It supports encrypted, damaged, or orphaned OST files and ensures that emails, attachments, and folder hierarchy remain unchanged. Its preview mode enables checking mailbox data before saving, while filters allow selective migration. Large PST files can be split, and multiple OSTs can be processed simultaneously with batch conversion. Exporting contacts into VCF/CSV and calendars into ICS enhances usability. Additionally, it provides smooth migration to Office 365 and Live Exchange.

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Convert an OST file to PST in Microsoft Outlook, start by opening Outlook and creating a new PST file. Go to <strong data-start="121" data-end="155">File > New > Outlook Data File, choose the <strong data-start="168" data-end="203">Office Outlook Data File (.pst) option, and save it in your preferred location. Next, open the <strong data-start="267" data-end="287">Account Settings under the <strong data-start="298" data-end="306">File tab, select the <strong data-start="323" data-end="337">Data Files tab, and locate your OST file. Afterward, go back to the main Outlook screen and drag and drop the folders or emails from your OST file to the newly created PST file. Once the data transfer is complete, verify that all emails, attachments, and folders have been properly copied. After ensuring the data is intact, close Outlook and back up the PST file to a safe location. Keep in mind that this method works best for non-encrypted, non-corrupted OST files.