=====Disable MailTips in Outlook 2013=====
To disable all access/use of MailTips in Outlook 2013 a GPO or registry setting can be set.

====GPO====
User Configuration\Administrative Templates\Microsoft Outlook 2013\Outlook Options\Preferences\E-mail Options \\
Setting: Disable Mail Tips.

====Registry====
<code>
Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Options\Mail]
"DisableMailTips"=dword:00000001

</code>

Source: [[https://technet.microsoft.com/en-us/library/ff631135.aspx#BKMK_MailTips|Microsoft TechNet - Plan feature customizations in Outlook 2013]]