Hi All,
I have similar issue:
I have Windows 11 installed as guest on Hyper-V running on Windows 10. After connecting the user I've initially created to MS account the user is not shown on the enhanced session login page. In case I switch to standard session I see all users.
The user associated with MS account is member of the following groups: Users, Administrators, Remote Desktop Users.
I've created a new local user and it is shown boot on enhanced and on standard session login page.
As a workaround I am able to login with the MS account on standard session, then with local user on enhanced session, then I connect to MS account session using task manager (Users tab / left click on user with MS account / Connect).
The solution mentioned by @Lloyd Cox did not work for me.
Additional info:
Host:
Corporate domain enabled
Edition Windows 10 Enterprise
Version 20H2
Installed on 8/11/2021
OS build 19042.1348
Experience Windows Feature Experience Pack 120.2212.3920.0
Guest:
NOT domain enabled
Edition Windows 11 Pro
Version 21H2
Installed on 11/19/2021
OS build 22000.348
Experience Windows Feature Experience Pack 1000.22000.348.0