If Outlook won't open or your profile is deleted, the calendar stored in the OST file may become unreachable. These situations make it necessary to extract calendar from OST file without relying on Outlook. The safest way to do this is by using the MailConverterTools OST to PST Converter Tool, which opens the file even when it is disconnected from the server. Users can preview calendar items, apply filters, and convert them directly into ICS format for easy import. With support for all Windows versions and large OST files, this tool ensures quick and accurate recovery of your important schedules and reminders. With the help of this software, users can convert OST files to CSV, PDF, MSG, EML, HTML, EMLX, MHTML, MBOX, etc. in the original format. It also allows users to import OST files in multiple email clients like Office 365, Gmail, Thunderbird, G Suite, IMAP, iCloud, AOL, Yandex Mail, Zoho Mail, Hotmail, and Yahoo Mail.