In order to show the meeting subject on the tablet with Spaceti application you might need to change Exchange online configuration.
access to a user with Global administrator permission (at least Exchange administrator)
all resources (meeting rooms) setup correctly in Microsoft Exchange/Admin portal
enabled Outlook integration - see article
properly set up meeting room tablets
CONNECT TO EXCHANGE ONLINE VIA POWERSHELL
Connect to Exchange online via Powershell.
$Cred = Get-Credential
You will be prompt to put your credentials there.
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $Cred -Authentication Basic -AllowRedirection
Please note that the following command is used once you will finish the configuration to terminate the session and then PowerShell itself.
You can check your current meeting room setup by the following command.
Get-CalendarProcessing -Identity <email_of_the_meeting_room> | Format-List
Replace <email_of_the_meeting_room> by specific meeting room/resource email.
Use the following command to SHOW MEETING SUBJECT (instead of meeting organizer name):
Set-CalendarProcessing -Identity <email_of_the_meeting_room> -AddOrganizerToSubject $false -DeleteComments $true -DeleteSubject $false
Use the following command to SHOW ORGANIZER NAME (instead of meeting subject):
Set-CalendarProcessing -Identity <email_of_the_meeting_room> -AddOrganizerToSubject $true -DeleteComments $true -DeleteSubject $true
INFO: you can use For-each function to set up all meeting rooms at the same time.