If you have any struggle with display the right information in Room Booking Application this could help you. By default, many Provider or on premises systems has a default behavior by displaying the Organizer instead of the topic of calendar events of the room mail box calendar. You can change the setting by using the following Power shell executable in Office 365 or on your own On-Premise Servers.
To switch that off you can simply run this cmdlet:
For Exchange Server 2019, Exchange Server 2016, Exchange Server 2013, or Exchange Server 2010
Set-CalendarProcessing -Identity <RESOURCEMAILBOX> -DeleteSubject $False -AddOrganizerToSubject $False
In Office 365 do the following steps:
Make sure that you have the execution rules
• Set a Room Mailbox to Show Details of a Meeting in its Calendar - Office 365 - Mikail's Blog
• Show Meeting Details of an Office 365 Room mailbox Calendar — LazyAdmin