Policy

Encrypt all e-mail messages

This policy setting allows you to require that all e-mail messages be encrypted when sent from Outlook. If you enable this policy setting, the Encrypt button is automatically selected on all outgoing e-mail messages, meeting invitations, and other Outlook items. Users must select an appropriate certificate to encrypt the message for the intended recipient. If you disable or do not configure this policy setting, outgoing e-mail messages are not encrypted. If you disable this policy setting, users will not be able to change the configuration.

Policy
Pack Microsoft Office
Category Microsoft Outlook 2016 / Security / Cryptography
Policy ID 10a72c50ff83
Internal name L_Encryptallemailmessages

Registry

Copy registry mappings

HKCU\software\policies\microsoft\office\16.0\outlook\security\alwaysencrypt (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\security\alwaysencrypt (disabled) = 0

Policy notes

This policy setting allows you to require that all e-mail messages be encrypted when sent from Outlook. If you enable this policy setting, the Encrypt button is automatically selected on all outgoing e-mail messages, meeting invitations, and other Outlook items. Users must select an appropriate certificate to encrypt the message for the intended recipient. If you disable or do not configure this policy setting, outgoing e-mail messages are not encrypted. If you disable this policy setting, users will not be able to change the configuration.

Related policies

Always use TNEF formatting in S/MIME messagesCheck for the user's private key when the user sends an encrypted email that includes the user as a recipientDo not check e-mail address against address of certificates being usedDo not display 'Publish to GAL' buttonDo not provide Continue option on Encryption warning dialog boxesEnable Cryptography IconsEnable Retrieval of Remote Certificate Authority Information