How do I book a meeting room for an invite that has been sent to me

So I have enabled ProcessExternalMeetingMessages as per below PowerShell commands:

PS> Get-Mailbox "ourroom" | Get-CalendarProcessing |select ProcessExternalMeetingMessages

ProcessExternalMeetingMessages
------------------------------
False

PS> Get-Mailbox "ourroom" | Set-CalendarProcessing -ProcessExternalMeetingMessages $True

PS> Get-Mailbox "ourroom" | Get-CalendarProcessing |select ProcessExternalMeetingMessages
ProcessExternalMeetingMessages
------------------------------
True

Now when external parties invites me to a meeting and I forward this meeting onto a meeting room resource calendar, it accepts the events and replies "accept" to meeting originator, however, I have no indication myself that the event had been accepted by the meeting room calendar.

If I forward it onto the meeting room - the room does not become a participant in my calendar.

If I forward it onto the meeting room AND myself - the room becomes a participant in my calendar, but it says that the meeting room "didn't respond", despite it having responded to the initiator.

I thus have no confirmation whether the meeting room has been successfully booked or whether it was declined due to an existing booking or other policy.

How can I get the resource room calendar to reply to all participants including myself that the room has "accepted" the meeting?