Enabling and Disabling Admin Mode
If you are an administrator, you can enable Admin Mode to prevent users from logging into applications while you perform administrative maintenance tasks, such as backup and restore operations.
When you change an application to Admin Mode, all users will be logged out of the system. If there are any pending tasks (for example, consolidation, data load, or metadata load), the application will not be changed to Admin Mode and waits until the pending tasks are completed before shutting down. After the tasks are completed, you can enable Admin Mode for the application.
Users are not allowed to log into the application until you disable the Admin Mode.
To enable or disable Admin Mode: