Works for Users, Not for Groups

Followed step in the article to build and configure. Created an EA in AAD and started provisioning. It works fine for Users but fails for Groups. Is this as expected?

FileSvc.exe built in VS2019 on Win10 1909, running on Windows Server 2019 Std.

This is the output if I try and provision a Group....

00000000-0000-0000-5102-0080000000fd<14>: System.NotSupportedException: urn:ietf:params:scim:schemas:core:2.0:Group
at Samples.FileProvider.SelectColumnsFactoryFor(Resource resource) in C:\Users\andy.MS\SCIM\AzureAD-BYOA-Provisioning-Samples-master\FileProvisioning\Provider\FileProvider.cs:line 762
at Samples.FileProvider.d__29.MoveNext() in C:\Users\andy.MS\SCIM\AzureAD-BYOA-Provisioning-Samples-master\FileProvisioning\Provider\FileProvider.cs:line 196
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.SystemForCrossDomainIdentityManagement.ProviderBase.d__31.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.SystemForCrossDomainIdentityManagement.ProviderAdapterTemplate`1.d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.SystemForCrossDomainIdentityManagement.ControllerTemplate`1.d__6.MoveNext() (Critical? False)