How do I configure Global Defaults Correctly?

it_gsr
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Scenario:
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A mailbox User, User A, has custom delivery limits of 20480KB  (20MB)for both sending an receiving message sizes.

The exchange organisation has 7168KB  (7MB)as the default for sending and receiving in Global Settings, Message delivery.

User A sends a mail message of 9MB to another User outside the exchange organization. He receives the NDR below:

From: System Administrator
Sent: Saturday, September 03, 2011 9:04 AM
To: User A
Subject: Undeliverable: Email Subject


Your message did not reach some or all of the intended recipients.

      Subject:  Email Subject

      Sent:     03-Sep-11 9:03 AM


The following recipient(s) cannot be reached:

      user@outsidedomain.com on 03-Sep-11 9:03 AM

            This message is larger than the current system limit or the recipient's mailbox is full.  Create a shorter message body or remove attachments and try sending it again.

            <hostname.localdomain.com #5.2.3>

Question:
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1, Why cant  User A send a 9MB email to  user@outsidedomain.com given the custom delivery settings in place for User A?

2, How do we configure exchange 2003 SP2 to allow User A to send the mail to user@outsidedomain.com without increasing the defaults in the global settings message delivery?
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Here are all possible locations of setting message size limits:
http://www.msexchange.org/tutorials/set-size-limits-messages.html

As I understand user mailbox setting should override global settings.
http://support.microsoft.com/default.aspx?scid=kb;en-us;322679
Commented:
The "Note"section of the microsoft kb articule says,
"Note All Internet e-mail messages use the global setting for limits on sending and on receiving. The message categorizer evaluates the sender's sending limit and the recipient's receiving limit. In example 2 earlier, a user with a user mailbox limit of 3 MB could receive messages from another user with a 3-MB sending limit. Because Internet users use the global setting, they can send only a 2-MB message."

I get the understanding that User A in my scenario will be limited by the 7MB global setting (his 20MB is only for internal email purposes) when he is sending mails to user@outsidedomain.com hence the NDR.

What's your take?
It seems that I have overlooked the note and you are right.

I have found another article with nicer explanation that confirms that:
http://blogs.technet.com/b/mohammad_qassim/archive/2011/05/18/message-size-limit-in-exchange-2003.aspx 

So the answer to your questions would be:
1. User settings overrides global settings if they are more restrictive or when sending/receiving internal mails.
2. Not possible.

Sorry, I really don't know where I was looking at with my first comment.

Author

Commented:
The note: section pointed out by my comment was helpful to the expert in answering my original question

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