Outlook Data Files (.pst), or Personal Storage Tables files, contain Outlook user messages and other Outlook items, such as contacts, appointments, tasks, notes, and journal entries. You might also use …

If you're using an Exchange email account, you can delete the offline Outlook Data File (.ost) and Outlook will recreate the offline Outlook Data File (.ost) the next time you open Outlook.

Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you …

Learn how to find out the size of your mailbox and its folders and how to compact Outlook Data Files (.pst and .ost), which might help improve performance.

Check the available space: Press Windows key + E to open File Explorer. Select This PC on the left to check the available space on your drive. Clear Microsoft Store cache: Press Windows key + R to …

Jun 15, 2024 · For information about Windows update terminology, see types of Windows updates and the monthly quality update types. To find an overview of Windows 11, version 24H2, see its update …

如果具有 Exchange 帐户且想要脱机工作或使用默认 缓存 Exchange 模式，则会用到 Outlook 数据文件 (.ost)。 如果帐户是通过适用于 Outlook.com（前身为 Hotmail）的 Outlook Connector 设置的帐户， …

Learn how to improve the clarity of text and images displayed on your screen by changing the screen resolution, scale and layout of your monitor.

Oct 28, 2025 · This non-security update for Windows 11, version 25H2 and 24H2 (KB5067036), improves functionality, performance, and reliability. To learn more about differences between security …

Windows 11 automatically downloads and installs updates to make sure your device is secure and up to date. This means you receive the latest fixes and security updates, helping your device run efficiently …