How many characters are required in the username and password? Both the username and password must have at least 8 characters. There is no upper limit. The password is case sensitive. Related ArticlesCan I register using a personal email address? August 25, 2015 I have completed the ACS renewal process, but now my account is not activated. What should I do? August 25, 2015 How do I register for a CHC ACS account? August 25, 2015 I have received an email saying that my account is due to expire. What should I do? August 25, 2015 Do I have to log in to access resources if I am using a computer from my health service? August 25, 2015