When an Outlook OST file becomes inaccessible due to a deleted Exchange/Microsoft 365 account, server failure, Outlook corruption, or an oversized mailbox, accessing important emails and attachments becomes difficult. Converting the OST file to PST is the most reliable way to recover and access Outlook data.
After testing multiple solutions, I shortlisted the Top 5 OST to PST Converter Tools based on their ability to handle corrupted/orphaned OST files, preserve email integrity, support selective conversion, preview mailbox data, and work without Exchange connectivity.
The list includes:
It totally depends on your specific requirements. To make the decision easier, I tested all of these tools and ranked them based on performance, ease of use, features, data integrity, and overall reliability.