Script Download: SendWelcomeMessage.zip 
http://gallery.technet.microsoft.com/scriptcenter/Send-Welcome-Mail-to-Each-4fff4a93 

This script could be used to send welcome mail for each newly created mailbox in Microsoft Exchange 2010. This script allows you to use an .html file as a template. You can use placeholders in this template file. This script allows you to replace these placeholders when the script is being executed.

In a real world, IT administrators are always required by human resource department to send welcome mail to each new employee. A welcome mail to a new employee who has accepted your job offer confirms the employee's decision to accept the position. It will save the new employee some feelings of insecurity and avoids misunderstandings.

 

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You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery