A vCloud Director system administrator can control system-wide settings related to LDAP, email notification, licensing, and general system preferences. Modify General System SettingsvCloud Director includes general system settings related to login policy, session timeouts, and so on. The default settings are appropriate for many environments, but you can modify the settings to meet your needs. General System SettingsvCloud Director includes general system settings that you can modify to meet your needs. Editing System Email SettingsYou can edit system email settings, including SMTP and notification settings. Configuring Blocking Tasks and NotificationsBlocking tasks and notifications allow a system administrator to configure vCloud Director to send AMQP messages triggered by certain events. Configuring System LDAP SettingsYou can configure vCloud Director to import user and group information from a supported LDAP service. System LDAP settings control how vCloud Director connects to an LDAP service, how often it synchronizes with that service, and how user and group names are mapped to LDAP attributes. Customize the vCloud Director Client UIYou can customize the branding of the vCloud Director client UI and some of the links that appear on the vCloud Director Home login screen. Configuring Public AddressesPublic addresses are Web addresses exposed to clients of vCloud Director. Defaults for these addresses are specified during installation. A system administrator can update them if necessary. Configure System LimitsSet limits for the maximum number of resource intensive operations, such as copy, move, Add to My Cloud, and Add to My Catalog, for the maximum number of console connections to a virtual machine, and for the maximum number of data centers per organization. These limits provide a defense against denial of service attacks. Configure the Account Lockout PolicyYou can enable account lockout to prevent a user from logging in to the Web console after a certain number of failed attempts. Configure vCloud Director to use vCenter Single Sign OnWhen vCenter Single Sign On is configured and enabled, system administrators are authenticated by the vSphere identity provider.