SugarIdentity---how to change other user password

Hi everyone,

I was trying to change other users' password as an administrator.

I can do that with my local test instance by config

admin--->password management--> system-generated passwords

But I couldn't find the 'system-generated passwords' for my on-demand instance after clicking 'password management'.

I'm guessing on-demand instance is using  SugarIdentity ?

If it is, how can I change other users' password now?

Anyone suggestion, please?