May 15, 2024
Credit: https://superuser.com/questions/977736/how-can-i-set-chrome-to-let-mailto-links-be-handled-by-outlook-com
Enter
navigator.registerProtocolHandler("mailto", "https://outlook.office.com/?path=/mail/action/compose&to=%s", "Office 365");
into the broswer on the Outlook page.