Hello Adam
I am working as your advice ,, I pickup an account which is having this problem.
search for it in Password history , it shows at the date of creation PASSWORD_NOT_INITIALIZED
however I tried to manual reset the password and enter the correct password , and the password history shows it correctly, but when trying to user Proxy_RDP ,, it returns with connection error :
The Target server encountered an error and has closed the connection. Please try again or contact your system administrator
I tried to log via windows RDP and everything goes right with the same user and password...
that's weird a little bit.
do you have any idea why that happened ?!
best regards