Policy

Check for the user's private key when the user sends an encrypted email that includes the user as a recipient

This policy setting controls whether Outlook checks for the user's private key when the user sends an encrypted email and the user is included as a recipient of the email. The user can be included as recipient either directly or as a member of a distribution list. If you enable this policy setting, Outlook checks for the user's private key. If you disable this policy setting, Outlook doesn't check for the user's private key. If you don't configure this policy setting, Outlook checks for the user's private key.

Policy
Pack Microsoft Office
Category Microsoft Outlook 2016 / Security / Cryptography
Policy ID 11017dddf756
Internal name L_AllowPrivateKeyCheck

Registry

Copy registry mappings

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

Policy notes

This policy setting controls whether Outlook checks for the user's private key when the user sends an encrypted email and the user is included as a recipient of the email. The user can be included as recipient either directly or as a member of a distribution list. If you enable this policy setting, Outlook checks for the user's private key. If you disable this policy setting, Outlook doesn't check for the user's private key. If you don't configure this policy setting, Outlook checks for the user's private key.

Related policies

Always use TNEF formatting in S/MIME messagesDo 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 InformationEncrypt all e-mail messages