I am facing a situation where my Outlook profile became inaccessible after a recent system update. I still have the OST file saved on my computer, but I can not open it in Outlook anymore. I have been searching for free ways to convert OST to PST, but most tools I find are either paid or have limitations. Can anyone suggest genuine free methods or manual steps to convert an OST file to PST format? I just need to recover my emails, contacts, and calendar items. If there are any safe and reliable approaches, please share the steps as well.