I cannot access my old OST mailbox anymore is there any method to convert it into HTML

[THOMPSON01]

I changed my system, and now Outlook is not recognizing my old OST mailbox. The file is important because it has project-related emails. I need a way to turn this OST into HTML so I can view everything on my browser.

 

[sjax240]

Use the best MacMister Mac OST to HTML Converter, a perfect and complete solution to convert or import OST files to HTML format including emails, contacts, attachments, tasks, calendars, etc. No technical skill is necessary to operate the software.