Disconnected mailbox files present a unique challenge when trying to read orphaned OST file data when Outlook won't open it, since an orphaned OST has lost its connection to the original Exchange account and Outlook typically refuse to load it without that linked profile being present. Recreating the original Exchange profile only works if the account still exists on the server, which is rarely the case for orphaned files resulting from account deletion, server migration, or employee offboarding scenarios. Attempting to force Outlook to recognize the orphaned file by renaming it or placing it in the default OST directory occasionally tricks the application into attempting a load, but this method is unreliable and frequently results in Outlook reporting the file as corrupted or inaccessible regardless of its actual condition. The SysInfo OST Viewer Tool reads orphaned OST files directly without needing any Exchange Server connection or matching Outlook profile, displaying mail items including emails, contacts, journals, and tasks immediately upon loading the file. The tool also generates a log file documenting the scan, useful for confirming what data was successfully accessed. Compatible with Windows, Mac, and Linux.