Occasionally, you might need to temporarily or permanently disable a user account. Disabling or locking a user account means that an invalid password, *LK*, is assigned to the user account, preventing future logins.
The easiest way to disable a user account is to lock the password for an account with Users tool.
You can also enter an expiration date in the account availability section of the User Properties screen. An expiration date enables you to set a limit on how long the account is active.