Hi,

I would not access the PST file from different machines, its not a recommended practice.

Office 365 will sync across all your computers - it's like having "Exchange lite" behind the scenes.

If you did not want to pay a continuing subscription fee (for Office 365) then you might want to investigate getting a 3rd party add-in that would do the synchronization for you. There are many listed here: http://www.howto-outlook.com/tag/sync

Mike Sperry
http://www.SperrySoftware.com
Find 37 Outlook add-ins that can make a difference!