Enable Cryptography Icons

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKCU software\policies\microsoft\office\16.0\outlook\security

Value name: convertsmimeblobsignedicons

Enabled: convertsmimeblobsignedicons = 1

Disabled: convertsmimeblobsignedicons = 0

Sets the value for the corresponding UI option.