I've installed D365 Sales in a new production environment (as from a previous reply you cannot install D365 on a default environment).
I now see the D365 icons in my left hand menus but on opening it I get the Power Apps screen that says at the top: Dynamics 365 - custom.
Also a warning message that says 'This is a legacy app and might have features or customizations that aren’t supported in Unified Interface. For best results, create a model-driven app for Unified Interface'
Can I use D365 anyway - or will I need to create a model-driven app?
Thanks