Your AccountID / Z-ID is assigned to you when you are admitted to NIU as a student or hired as an employee. It is cancelled after you leave NIU.
You need your AccountID/Z-ID and password to access computing and communications services at NIU like:
Your initial password is your date of birth in YYYYMMDD format. For example, 19820509 would be the initial password for a birth date for May 9, 1982. This is a temporary password. You need to change this password to a permanent password at www.password.niu.edu.
Learn more - Passwords at NIU