- Extension
- .ost
- .xaml
- Format
- Binary
- Category
- Email
- Vector Image
- Developer
- Microsft
- Microsoft
- Description
- n OST file is a data file created by Microsoft Outlook (2005 or later), an email client and personal information manager. It is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. OST files may contain email messages, contacts, tasks, calendar data, and other account information.
- Extensible Application Markup Language file that uses Windows Presentation Foundation (WPF) code; XAML (pronounced "zammel") is a descriptive programming language developed by Microsoft for creating user interfaces; introduced during the development stages of Longhorn, which is now Windows Vista.
- MIME Type
- application/x-ms-offline-storage
- application/xaml+xml
