By default, Outlook follows the sync interval specified by the Internet Calendar publisher and Internet Calendar subscriptions will not be sync'd more often than allowed by the Internet Calendar publisher. This setting allows you to prevent users from overriding the sync interval published by Internet Calendar publishers.
Registry Hive | HKEY_CURRENT_USER |
Registry Path | software\policies\microsoft\office\16.0\outlook\options\webcal |
Value Name | ignorettl |
Value Type | REG_DWORD |
Enabled Value | 1 |
Disabled Value | 0 |