DavidYorkshireThanks for your feedback! I fully understand that as of now, the new Outlook for Windows replaces the consumer-oriented Windows Mail and Calendar apps. But since we remove them during a device imaging (be it AADJ and Intune-managed or HAADJ and Intune-SCCM co-managed), I cannot imagine that its installation could be considered as an update to a software that is no more installed...
As for Windows 11 v23H2, the Microsoft.OutlookforWindows Appx package is now provisioned as part of the Windows image -- as is (or was?) Microsoft.WindowsCommunicationApps that provided Windows Mail and Calendar. Depending on your scenario, you may want to deprovision it just like you did with Windows Mail/Calendar. What we observe currently, though, is that even when deprovisioning Microsoft.OutlookforWindows during imaging, something pushes it again some time after imaging has ended. We have a case opened with Premier, and investigating on that.