Offline storage table (OST) and personal storage table (PST) are two different Outlook data files used to store a copy of mailbox items on local storage. Outlook creates a PST file when you add a POP3 ...

This post features solutions to fix this data file is associated with a mail account OST file error on Outlook. This error can occur when a user fails to delete an ...

OST (Offline Storage Table) files are Microsoft Outlook data files that store an offline copy of your mailbox data, such as emails, contacts, messages, notes, etc. While you can access and view OST ...

You can select any of the above options. If you want to open the file, click Open. As explained above, this is not an error message. It is a warning message which can ...

Many users of the desktop version of Outlook are being confronted with an annoying problem: When you open Outlook, the mail program included in Microsoft 365, it repeatedly asks whether you want to ...