It is impossible to change user password with
C:\>vzctl set CTID --userpasswd test:"*****" Cannot set password in CT CTID for user test SetUserPassword for container CTID returned 0x040008AD
Most probably, there is no such user inside the container.
Verify if such user exists:
C:\>vzctl exec CTID net user test The user name could not be found.
If it's required to create the user manually:
C:\>vzctl exec CTID net user test password /add