exchange 2007 the attachment size exceeds the allowable limits

I am trying to set up Exchange 2007 to allow for all users to be able to send & receive messages of up to 40 Mb. I finally found a setting in powershell that was set to 10 Mb. I changes this to 40 Mb but it still isn't working.

I am totally stumped on where the setting resides that I need. Here is the PS output:
[PS] C:\>get-transportconfig


ClearCategories                : True
DSNConversionMode              : UseExchangeDSNs
GenerateCopyOfDSNFor           : {5.4.8, 5.4.6, 5.4.4, 5.2.4, 5.2.0, 5.1.4}
InternalSMTPServers            : {127.0.0.1}
JournalingReportNdrTo          : <>
MaxDumpsterSizePerStorageGroup : 18MB
MaxDumpsterTime                : 7.00:00:00
MaxReceiveSize                 : 100MB
MaxRecipientEnvelopeLimit      : 5000
MaxSendSize                    : 100MB
TLSReceiveDomainSecureList     : {}
TLSSendDomainSecureList        : {}
VerifySecureSubmitEnabled      : False
VoicemailJournalingEnabled     : True
WritingBrandingInDSNEnabled    : True
Xexch50Enabled                 : True

Is there a way to force update the Transport Config? Is this an instant Change? does the user need to restart outlook to test?
Are there other settings that I need to verify?