OST files are used by which application to store offline mail data?

OST files are used by which application to store offline mail data?

• A. Microsoft Outlook
• B. Mozilla Thunderbird
• C. Eudora
• D. OpenOffice

Answer: (A)

Offline Storage Table (OST) files are the local cache Outlook creates for Exchange accounts so you can read, compose, and organize mail without being online. The OST keeps a complete copy of your mailbox on the device and stays synchronized with the server when you reconnect, so changes you make offline are uploaded and you see updates from others when online. This storage method is specific to Microsoft Outlook (in Cached Exchange Mode) and is why you’d see an OST file on a system using Outlook with Exchange. Other mail clients use different local formats—Thunderbird uses MBOX/Maildir-style storage, Eudora uses its own mailbox formats, and OpenOffice isn’t an email client and doesn’t manage offline mail data.

Offline Storage Table (OST) files are the local cache Outlook creates for Exchange accounts so you can read, compose, and organize mail without being online. The OST keeps a complete copy of your mailbox on the device and stays synchronized with the server when you reconnect, so changes you make offline are uploaded and you see updates from others when online. This storage method is specific to Microsoft Outlook (in Cached Exchange Mode) and is why you’d see an OST file on a system using Outlook with Exchange. Other mail clients use different local formats—Thunderbird uses MBOX/Maildir-style storage, Eudora uses its own mailbox formats, and OpenOffice isn’t an email client and doesn’t manage offline mail data.