HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\webcal

Do not include Internet Calendar integration in Outlook
- HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\webcal\disable
Automatically download attachments
- HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\webcal\enableattachments
Disable roaming of Internet Calendars
- HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\webcal\disableroaming
Override published sync interval
- HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\webcal\ignorettl