Outlook 2003 Extra .PST files - Cannot make available offline?

Here's the quick description of what I am trying to do. I am using Microsoft Exchange server and connecting with Outlook 2003. On any folders in my "Mailbox - <real name>", I have the option to make the folder available offline by using:

Tools --> Send/Receive --> Send/Receive Settings --> Make This Folder Available Offline

I have an extra .PST file that I use for mail management that's saved outside of the Mailbox tree, and it's saved on a network drive. I do not have the option to set up this folder as "Make This Folder Available Offline".

Is there a way to enable this option for the external .PST file that's hosted on a network drive?
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In short, no.
An Offline Folder file keeps a local copy of your Exchange Server mailbox on your computer and you are restricted to be using a Microsoft Exchange Server e-mail account only.

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Where do you want this data accessible offline? Your notebook away from the office? Or a desktop at home that connects to Outlook Web Access?

Not sure this will help but, take a look here at syncing between two computers.

Here's an article about maintaining PST's on two computers
Microsoft KB 238777

You can use the Briefcase utility.
If you want a single PST to use from either computer (i.e. all mail received shows up on both) , either shut down outlook and copy the PST between the computers or use outlook on only one of the two machines, and use Remote Desktop to access that machine from the other.
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