Newbie question about Set-CalendarProcessing

I am trying to run the following command to change my Teams Room Display Panel to show the Meeting Subject, not the organizer name.

I have Microsoft 365 with Exchange online, not on premise.

Set-CalendarProcessing -Identity email address removed for privacy reasons -DeleteSubject $False -AddOrganizerToSubject $False

But I get this error ...

Set-CalendarProcessing : The term 'Set-CalendarProcessing' is not recognized as the name of a cmdlet, function, script file, or
operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\Users\administrator.YRSD\Documents\scripts\Teams-Panel-Display.ps1:3 char:1
+ Set-CalendarProcessing -Identity email address removed for privacy reasons -D ...
+ ~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (Set-CalendarProcessing:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

I have tried importing the following modules ...

Import-Module ExchangeOnlineManagement
Import-Module MSOnline

But I still get the same error.

I am trying to run this Powershell session on a local machine with admin privilege's.

What do I need to do to get this command to run?