Your Outlook Data File is composed of a file header, located at the beginning of the document, and the actual data that makes up your personal folders. Contained in the header is information about ...

When Outlook continually looks for data file errors, that's because Outlook believes there is a problem. However, to repair any errors, the data file -- more specifically the Outlook .pst file -- ...

Outlook Data File – The file C:\Users\<username>\AppData\Local\Microsoft\<username>\username.ost is in use and cannot be accessed. Close any application that is using this file, and then try again.

An Outlook Data File (.pst) file is a copy of the information in your Outlook account (including, but not limited to, emails, contacts, and appointments) stored on your local device.

What is a PST File? The PST File of Microsoft Outlook is a useful application that allows the storage of Outlook emails for both received and sent emails in the hard drive of the computer.

What causes This data file is associated with a mail account OST file on Outlook? It’s a very unusual error, and there is no specific reason why it may occur.

But when I try to open Outlook the next time, I get a pop-up that says this: “MS Office Outlook — The data file ‘Personal Folders’ was not closed properly.

Once you’ve installed Outlook onto the new PC, you’ll have a fresh, clean, and empty .pst file. You’ll have to import data from the old file to the new one.

I seem to be having an issue moving some Outlook data from an old computer to a new one. Old computer is running Outlook 2003, new computer is running Outlook 2010. 1) I installed Office 2010 on ...