Exchange 2007, deduplication, distribution groups

If I send an email with an attachment to a distribution list with 5 recipients, does that attachment and email take up 5 times the amount of space on the server?

I thought I read that the Exchange database only keeps one instance of that email and attachment, but I can't find that article. Maybe I mis-read it? THanks
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You are correct, it does NOT take up 5 times the amount of space.  Let me see if I can dig up an article.
OK, apparently in 2007 it only maintains the Single Instance Storage for attachments, not for actual emails.  From what I've heard, this feature is fairly resource intensive and I believe it may have been done away with completely in Exchange 2010.

Near the middle of that page, right above the red section heading called "Transaction Log File Size Changes".

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fina27Author Commented:
This is great! thanks
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