No, Outlook isn't a webapp in a lot of entrenched corporate set ups. Many are relying on outlook plugins that only work on the executable, or don't have Azure A

No, Outlook isn't a webapp in a lot of entrenched corporate set ups. Many are relying on outlook plugins that only work on the executable, or don't have Azure AD and use their own local domain controllers, or local mail servers, etc... And besides, it's far easier to migrate between two webapps than it is away from a native app full of infra.