Exchange: Send Welcome Email to New Mailbox / New Users – Cmdlet Extension Agents

Cmdlets="New-Mailbox

http://blogs.technet.com/b/sukum/archive/2014/06/21/send-welcome-email-to-new-mailbox-users.aspx

Exchange 2010: automatic welcome message for a new user:

Cmdlets="New-Mailbox,Enable-Mailbox

http://itnuts.wordpress.com/2013/09/03/exchange-2010-automatic-welcome-message-for-a-new-user/

Cmdlet Extension Agents:

http://technet.microsoft.com/en-us/library/dd335054(v=exchg.150).aspx