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 …

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 …

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.

Los archivos de datos de Outlook (.ost) se usan cuando tiene una cuenta de Exchange y quiere trabajar sin conexión o usar el Modo caché de Exchange predeterminado.

Als u een Exchange-e-mailaccount gebruikt, kunt u het offline Outlook-gegevensbestand (.ost) verwijderen en wordt het offline Outlook-gegevensbestand (.ost) opnieuw gemaakt wanneer u …

Some accounts (IMAP, Microsoft Exchange Server, and Outlook.com) use an offline Outlook Data File (.ost). This is a synchronized copy of the messages saved on a server.

若要縮小 Outlook 數據檔 (.pst) 或離線 Outlook 資料檔 (.ost) 的大小，您可以手動壓縮數據檔。 在下方選取您的 Outlook 版本，以查看如何縮減 .pst 或 .ost 檔案大小的指示。

當您有 Exchange 帳戶，並且想要離線工作或使用預設 Exchange 快取模式 (離線) 時，就會使用 Outlook 資料檔 (.ost)。 此資料檔類型也適用於您透過適用於 Outlook.com (先前稱為 Hotmail) 的 Outlook …

Outlook-gegevensbestanden (.ost) worden gebruikt wanneer u een Exchange-account hebt en offline wilt werken of de standaard Exchange-modus met cache wilt gebruiken. Dit type gegevensbestand …