Using Classic Outlook on Windows for personal email, calendar, and contact management
I am not able to add custom "apps" or Add-ins" to either my OWA or New Outlook for Windows. The option is not there on the ribbon, and I can't seem to have the option to add it. This link has a suggestion:
https://support.microsoft.com/en-us/office/use-add-ins-in-outlook-1ee261f9-49bf-4ba6-b3e2-2ba7bcab64c8, but that doesn't work for me either, navigating to https://aka.ms/olksideload simply sends me to my inbox, no Add-Ins for Outlook dialog...