One or more organization message size restrictions that are used by Exchange 2010 conflict with the corresponding settings ...

One or more organization message size restrictions that are used by Exchange 2010 conflict with the corresponding settings that are used by Exchange 2003. To avoid inconsistent behavior between Exchange Server versions, you must use the Set-TransportConfig cmdlet to configure the following parameters: MaxReceiveSize, MaxSendSize, MaxRecipientEnvelopeLimit. This will modify the corresponding settings that are used by each Exchange Server version.