3. Why can't I find where my Outlook data is stored?
All of your mail, contacts, attachments, calendar information and so on - pretty much the whole Outlook data shebang — is stored in a single .pst file. You often need to know where that file is located if you want to, for example, back it up or move it between machines. But Microsoft has a penchant for changing the .pst location from version to version of Outlook, and you might have a hard time finding it.
In addition to the .pst data file, Outlook uses a variety of other files that do things such as store your personal preferences. You often want to know their locations as well.
Outlook 2007 generally stores its .pst files in different locations depending on whether you're using XP or Vista. In Vista, you'll find it in C: \Users\YourName\AppData\Local\Microsoft\Outlook, where YourName is your Windows user name. In XP, it's usually in C: \Users\YourName\Local Settings\Application Data\Microsoft\Outlook.
Of course, there's also a chance that Outlook has stored them in a different location, but at least it's easy to find their location: In Outlook, choose 'File' then 'Data File Management'. Look for the Personal Folders listing for your Outlook .pst file. Next to it, you'll see its location listed.
As for all the other Outlook files, in Vista, you'll find them in C:\Users\YourName\AppData\Roaming\Microsoft\Outlook, and in XP they're in C:\Users\YourName\Application Data\Microsoft\Outlook.