Prevent users from adding e-mail account types
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\outlook\options Options
disableexchange boolean disableeas boolean disablepop3 boolean disableimap boolean disableothertypes boolean Description
Disables/Enables the option for adding e-mail account of the associated type in the Server Types page of the E-mail Accounts dialog box.