Show declined events on the calendar

Hello AndresGorzelany .

Yes, there is a way for tenant admins to force PDM OFF for all users in a tenant via a cmdlet: Set-CalendarSettings <tenant-name> -EnablePreserveDeclinedMeetings $false. The result is that no user will see the toggle in (OWA or new Outlook Desktop) Settings to turn PDM on anymore. And for the users that had already turned PDM on manually before the admin ran the cmdlet, the admin's tenant setting will override the user's individual setting. 

However, there is no admin-side switch to force/override PDM ON for all users in your tenant. We made this call on purpose for usability reasons for now. We can reassess the decision later as user feedback come in.

Additionally, FYI, in the long run, our intention is also to have PDM enabled by default for all users in all tenants as a core standard functionality across all Outlook clients. In this case, there will be no more user settings toggle and no more admin cmdlet to force it off.

regards,

Gio