What is the default location of OST file?

The OST file will be saved in a hidden format and default location the file is as given below,

• For Windows 7 and Windows Vista – drive:\Users\user\AppData\Local\Microsoft\Outlook
• For Windows XP – drive:\Documents and Settings\user\Local Settings\Application Data\Microsoft\Outlook

You can even change the default location if it is not configured with Windows Live Hotmail account.