The full administrator uses the AD Users and Computers MMC and selects the security tab on the LoadGen Objects OU select Advanced view add the regular user account select Full Control and Apply to “This object and all child objects.” The full administrator changes the directory access user account name and password, which is visible in clear text in the XML file, to random strings.
By default, LoadGen will continue even if an exception has been raised-for example, because the LoadGen client cannot connect to the Exchange server and a MAPI protocol error occurs. You use stress mode only when you want to put the Exchange server under high load and do not want to simulate a specific user behavior. If you select stress mode, LoadGen will try to execute the tasks as fast as it can and ignores the deterministic distribution of the tasks over the simulated workday. The length of the simulation specifies how long a test will run. If you reduce this value, you increase the load on the Exchange server. This determines the rate at which LoadGen dispatches a new task for the user. LoadGen will divide this value by the number of tasks that a user performs per day. In Figure 10-22, you define the length of the simulation day. If you use LoadGen in a root/child environment and want to create the LoadGen AD objects in the child, you have to run LoadGen with a user of the child AD domain. In this case, you can use a custom script to create the user accounts and mailboxes, and direct LoadGen to this AD container when it searches for test user accounts. This is very handy if you have to run the test in an environment where you are not allowed to create additional top-level OUs and you have to create your test AD objects in a different AD container. You can overwrite these parameters and specify a custom AD container. By default, LdapSearchFilter will pick all user objects beneath LdapBaseDN, and LdapBaseDn points to OU= LoadGen Objects, DC=. The LoadGen configuration file contains two parameters to restrict users selected for the test: LdapSearchFilter and LdapBaseDn. All LoadGen-created objects are located under this OU. If you use LoadGen to create these objects in AD, LoadGen will create the top-level container OU= LoadGen Objects, DC=. LOADGENCMD.EXE cannot create objects in AD you have to point it to existing objects. LOADGENWIN.EXE can be used to create these objects in AD or you can point it to an OU with existing test users. LoadGen needs user accounts in AD for the mailboxes that it uses during the test. Pierre Bijaoui, Juergen Hasslauer, in Designing Storage for Exchange 2007 SP1, 2008 Test Topology in Active Directory