[windows] Permission denied when native-mounting folders owned by "NT AUTHORITY\SYSTEM"

[ricab]

Describe the bug
Multipass can't create native mounts for folders owned by "NT AUTHORITY\SYSTEM". These include the "home folder" on Windows (C:\Users<username>).

PS C:\Users\ricab> multipass mount --type native . test:Home
Please enter your user password to allow Windows mounts:
mount failed: The following errors occurred:
error mounting "Home": Error: mount error(13): Permission denied
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)

To Reproduce

1. multipass mount --type native "C:\Users\<username>" test:Home

Expected behavior
What did you expect to happen?

• OS: Windows
• multipass version: 1.12.0-dev.131.pr498+g7fb15eaf.win (after fix for [Windows] Unable to establish native mount when owner is "NT AUTHORITY\SYSTEM" #2901)
• multipass get local.driver: hyperv

Additional Info
I tried with psexec -s, but it then seems unable to request a user password. If I add -i, a console pops up requesting the password, but still fails, the console closing too quickly to read any message that may have appeared. I did not pursue any further.

[ricab]

Actually, I just tried with a "super-privileged" shell: run admin shell, psexec -s -i powershell inside, find the multipass executable in the shell that opens up (not in PATH) and run it. I get the same permission denied...

[gianluca-sabena]

I still have this problem on windows with hyperv

multipass --version
multipass   1.12.0+win
multipassd  1.12.0+win

Dmesg error

[53645.968491] CIFS: Attempting to mount \\*********\a9e23237-bfce-4d40-868d-0569e60290d4_hyperv-ubuntu:
[53645.995204] CIFS: Status code returned 0xc000006d STATUS_LOGON_FAILURE
[53645.995211] CIFS: VFS: \\********* Send error in SessSetup = -13
[53645.995306] CIFS: VFS: cifs_mount failed w/return code = -13

********* = my wiindows host name