Using Classic Outlook on Windows for personal email, calendar, and contact management
You cannot toggle from outlook New on windows 10! As soon as you select mail it immediately in a milli-second downloads outlook New! Then you have come out, go to settings, select Apps, select the now downloaded outlook New, then uninstall the New Outlook ,wait for that to happen, go back and select outlook classic ,and if you are very lucky and fast enough, you can Dismiss the New for the favoured Classic, AND you have to go through this process every time you want your mail in Classic. Its a disgrace that we are held to ransom by Microsoft,I have been trying for months to communicate with them, but they say this the way they want to go ,so tuff cheese public. !