Local Data vs. Server Data

Can someone please tell me the difference between local data and server data in Outlook and why these two numbers would be different?  If you right click on your server inbox, go to properties, general, folder size.  I have Outlook 2003 by the way.

Thanks!
mb2010Asked:
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wiggs1006Commented:
Local data would be the information that you have stored on your machine...say you create a new personal folder (PST file) and store it on your C: drive this would be considered local data and it would not count against any quotas that are imposed on you for storage on the server.  Most companies set up a quota limit so that mailbox stores on the Exchange server do not get out of hand.

Does this help you out in any way?
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Nat_cCommented:
The local data is the space taken up by the OST (locally cached) file and the Server data is whats stored on the Exchange server. In terms of items (which you can checked on the sychronisation tab of the properties) the numbers should be the same. A couple of educated guesses as to why the physical space taken up would be different is:

Hard drive cluster size, the larger the hard drive the larger and less efficient the clusters are

I understand that exchange create pointers to attachments to improve storage efficiency, i.e. if you send a message to 5 people they each get a pointer to 1 location

Please don't take this as fact but I'm sure that I'm along the right lines, maybe someone else can fill in the blanks.

Nat
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mb2010Author Commented:
Hmm!  I'm not talking about PST files here.  I'm speaking of the properties of the actual Inbox on the server.
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Nat_cCommented:
Outlook 2003 has a uses a cached mode where it creates an OST which similar to a PST but is a permanently sychronised copy of your exchange mailbox, this allows you to view all of your exchange information even if you aren't connected to the exchange server. This is the file that I was talking about. This is definately the file that the properties of the inbox is referencing when is says "local data"

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