Using New Outlook on Windows for personal email, calendar, and contact management
@Tony Ayling said
lists show there is a number of contacts but the Members tab is empty on all lists
I think you've run into a known bug in the People App of New Outlook for Windows. Is this what you see:
But if you double-click on the List, you see:
But if you Edit the list, you see your members:
Also, if you use the List in the "To:" of an email it has all the members:
Workaround - For a Microsoft email account (e.g. outlook.com) you can use Outlook Web. It will show the Members correctly.
https://outlook.live.com/people/