Disable TNEF (winmail.dat) issue
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\Preferences]
"DisableTNEF"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences]
"DisableTNEF"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Preferences]
"DisableTNEF"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences]
"DisableTNEF"=dword:00000001