IMPOSSIBLE TO CONNECT AUTOMATICALLY WITH REMOTE COMPUTERS

I have recently purchased a business account. I have added a number of my clients's computers and using the management console I assigned passwords to all of them.

However I cannot connect to any of them because the passwords are rejected. I am forced to ask the person on the other side to give me the automatic password shown on their local version of TeamViewer.

How can I connect without human intervention? Sometimes I need to work at night, when the remote company is closed for business