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The user maintenance functions of the SAP system include a comprehensive information system where you can look up, display, and analyze the users, profiles, or authorizations of the system. The system permits extensive navigation among the information: from users to profiles, from there to authorizations, and so on. To reach the user and authorization information system, from the main user maintenance menu, select Information Information system. The system displays a report tree corresponding to the authorization information system. These report trees contain several folders, each of which contains different reports. Figure 9 6 shows this report tree. By running different reports from the report tree folders, you can get a list of users, profiles, objects, authorizations, and so forth. The system presents several selection screens to permit searching for different criteria.
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Password Management
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Figure 9 6: Authorization info system report tree. Another very useful report collection is the Change documents folder reports, which can be used for displaying any modifications made to authorizations, users, or profiles and tells who did the modification.
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To change a password for a user, click the Change password push button on the application toolbar from the initial user maintenance screen. The system will display the new password dialog box where you have to enter the password twice to verify that you didn't make any typing mistakes. When system managers change the password for other users, the system requests these users to enter the new password when they log on. Administrators can change their passwords and other users' passwords as many times as they wish; however, normal privileged users can only change their passwords once a day. By default and right from installation, there are some standard requirements concerning passwords. Some of the restrictions are set up in the system code and cannot be changed, while others can be changed as required by setting some instance profile parameters or by configuring system tables. For example, system administrators might decide to set up a minimum password length or enter a character string as a nonpermitted password. On the other hand, passwords are not case sensitive, so uppercase and lowercase passwords or a mix and match of both cases behave exactly the same.
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The passwords restrictions and requirements are as follows: The password cannot be the word pass. Minimum password length is set by default to three characters. Administrators can change this setting by specifying a greater value in the instance profile parameter login / min_password_lng. If you change this parameter, be sure to do it in the common DEFAULT.PFL so that it has effect on every instance of the SAP system. Maximum password length is always set to eight characters. The password can't begin with any sequence of three characters contained in the user ID. For example, if a user ID is FREDSMITH, the password cannot begin with the letters: FRE, RED, EDS, SMI, and so on. The first character of a password cannot be an exclamation point (!) or a question mark ( ). The first three characters of a password cannot contain a space character. 318
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Restricting Password Strings When a user changes his or her password, he or she may not use any of the last five passwords. Administrators can decide to forbid certain strings to be used as passwords. Users will receive an error message in the status bar when specifying a password which has been forbidden by the administrator. The process of forbidding passwords is explained later. A password cannot begin with three identical characters. For example: aaamy and bbbyou are invalid passwords. A user must change his or her password if there is an expiration date in the user master account and the date has arrived. System managers can decide how frequently the users must enter new passwords. To enforce password changes, set the instance profile parameter login / password_expiration_time with a value indicating the number of days after which a password must be changed. For example, if the profile parameter is set to 30, users will be requested to change their password every month. To leave the passwords without limit, the default value 0 is used for this parameter. With the previous restrictions and other user master records rules, the process of logging on to R/3 requires some more work for the system code to do besides checking the password. For instance, when a user tries to log on with a correct password, the system first checks whether the user is locked. If the user is locked either manually by the system manager or automatically after 12 unsuccessful logon attempts or by a system upgrade, the system displays an error message. If the user is not locked, then R/3 checks whether the current password has expired. In this case, the system requests the user to enter a new password.
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