Microsoft Outlook uses two file types for holding message, calendar, task and notes data: PST and OST files. PST files are created in the user's computer for non-Microsoft Exchange accounts ...

Just note that these are reserved mainly for the desktop version and don't include your Chromebook (your Chromebook relies on Outlook.com). But what happens if these files become compromised ...

You can restore the missing Run a script option in Outlook rules by using a Registry ... Value option from the context menu that appears. After that, name this newly created DWORD as ...