PS> Install-Module -Name ExchangeOnlineManagement -Scope CurrentUser
You can read more about ExchangeOnlineManagement in the Microsoft Exchange documentation.
PS> Import-Module ExchangeOnlineManagement
PS> Connect-ExchangeOnlinePS> Get-Mailbox -RecipientTypeDetails RoomMailbox | Set-CalendarProcessing -RemovePrivateProperty $false -DeleteComments $false -DeleteSubject $false -AddOrganizerToSubject $false
The command updates settings for calendars of all rooms in your organization. The flags used are:RemovePrivateProperty $false - private meetings will be flagged as private in the meeting room calendar.DeleteComments $false - keep meeting description in the meeting room calendar.DeleteSubject $false -AddOrganizerToSubject $false - don't replace the meeting summary with the organizer's namePS> Disconnect-ExchangeOnline