Does this work? This code comes from https://docs.microsoft.com/en-us/office/vba/api/outlook.application.newmail
Public WithEvents myOlApp As Outlook.Application
Sub Initialize_handler() 
Set myOlApp = Outlook.Application 
End Sub 

Private Sub myOlApp_NewMail() 
Dim myExplorers As Outlook.Explorers 
Dim myFolder As Outlook.Folder 
Dim x As Integer 
Set myExplorers = myOlApp.Explorers 
Set myFolder = myOlApp.GetNamespace("MAPI").GetDefaultFolder(olFolderInbox) 
If myExplorers.Count <> 0 Then 
For x = 1 To myExplorers.Count 
On Error GoTo skipif 
If myExplorers.Item(x).CurrentFolder.Name = "Inbox" Then 
myExplorers.Item(x).Display 
myExplorers.Item(x).Activate 
Exit Sub 
End If
skipif: 
Next x 
End If 
On Error GoTo 0 
myFolder.Display 
End Sub