It would be a part of configure the inside registry of windows.
Here what I found : http://helpdeskgeek.com/office-tips/prevent-users-from-creating-new-email-accounts-in-outlook/
Else If you doesn't want to let you ppl can't leak their mails than a perfect utility would be ...
A Software Name Protegent Pro might gives you satisfactory result because it has modules more than an antivirus.
Download URL : http://www.protegent360.com/download.html
Thanks
Sean Cruz
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