Equipment calendar

Hi,

please use O365 at work. We have in the directory rooms (rooms) and cars (Equipment). When I create a meeting request, I select the ALL Rooms group from the Address List, so I see the list of rooms. I tried to add a selection of items to the global directory - the list is empty. We've used these queries, but they don't work:

((Alias -ne $ null) -and (((RecipientDisplayType -eq 'EquipmentMailbox') -or (RecipientDisplayType -eq 'SyncedEquipmentMailbox'))))

((Alias -ne $ null) -and (RecipientTypeDetails -eq 'EquipmentMailbox'))

The question is how do I add a list of cars (Equipment) to the All address list?

Alternatively, please, how can I centrally use a policy, for example, to create a calendar for all users in Outluk that will contain specific cars?

thank you for answer

Thomas