New-SystemMessage cmdlet can be used in Microsoft Exchange Server 2010 to create customized delivery status notification (DSN) or quota messages, in the specified language, on computers that have the Hub Transport server role or Edge Transport server role installed.

This example creates a customized WarningMailbox quota message. This message is displayed to users who meet the following criteria:

• The mailbox has exceeded the warning mailbox limit configured on the mailbox.
• The mailbox is located on a server that uses the English locale.

New-SystemMessage -QuotaMessageType WarningMailbox -Language en -Text “Your mailbox has exceeded the warning limit as determined by the organizational policy. Please do the needful”