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Parameters directly affecting the user management functions are as follows: login/fails_to_session_end . Indicates the number of times that a user can enter an incorrect password before the system closes the logon window. The default value is 3, but you can set it to any value between 1 and 99. login/fails_to_user_lock. This parameter sets the number of times a user can enter an incorrect password before the system automatically locks the user out. If this happens, the user is automatically unlocked at midnight. The default value is 12. Possible values are from 1 to 99. login/system_client. Sets the default system client. This client is automatically filled in the client field of the logon screen, although users can overwrite it. login/min_password_lng. Specifies the minimum password length. Default values is 3, but you can specify any value between 2 and 8. login/password_expiration_time. Indicates in number of days the period of validity for passwords. When the expiration time arrives the user is asked to enter a new password. login/no_automatic_user_sap* Disables special properties for user SAP* when this parameter is set to a value greater than 0. rdisp/gui_auto_logout. Specifies the number of seconds a user session can be idle before being automatically logged off by the system. auth/check_value_write_on. Enables the transaction for authorization analysis SU53, when this parameter is set to a value greater than 0. Note: To make the parameters globally effective in a SAP system, set them in the default profile DEFAULT.PFL. To make them instance-specific, you must set them in the profiles of each application server in your SAP system.