You're deep into a big work project, relying on emails and notes in your Outlook. Suddenly, your Exchange server goes offline. Your OST file locks up, and all that vital data vanishes from sight. Panic sets in. OST files hold your offline copies of emails, contacts, and calendars. They link tightly to your Exchange Server or Outlook profile. Without that connection, you can't touch th... https://dev.to/vsofftware/recover-outlook-ost-data-and-save-it-as-pst-format-27e