This policy setting controls whether Outlook users can publish e-mail certificates to the Global Address List (GAL).
If you enable this policy setting, the "Publish to GAL" button does not display in the "E-mail Security" section of the Trust Center.
If you disable or do not configure this policy setting, Outlook users can publish their e-mail certificates to the GAL through the "E-mail Security" section of the Trust Center.
| Registry Hive | HKEY_CURRENT_USER |
| Registry Path | software\policies\microsoft\office\16.0\outlook\security |
| Value Name | publishtogaldisabled |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |