JIRA provides a built-in workflow Editor, empowering users to customize workflows according to their project requirements. This intuitive tool allows for the creation of custom workflows tailored to specific processes, enabling teams to align JIRA workflows with their unique project management methodologies and workflows.

An "Epic" in JIRA Agile boards represents a large body of work that can be broken down into smaller tasks. It is typically used to capture and manage big initiatives or features that span multiple sprints. Epics provide a higher level of organization and help in planning and tracking progress at a broader level. Understanding the concept of Epics is crucial for effective Agile project management using JIRA.

When setting up automation, you can use Test Runner to test and simulate rule executions. Test Runner enables users to run their automation rules against sample issues or real data to ensure they function as intended.

The JIRA User Server, often integrated with LDAP (Lightweight Directory Access Protocol) or Active Directory, is responsible for managing user authentication in JIRA. It authenticates users and authorizes their access to JIRA based on their credentials stored in the directory service.

System maintenance in JIRA involves various tasks aimed at optimizing performance and ensuring stability. Regular monitoring of system performance metrics helps identify potential bottlenecks or issues affecting performance. Optimizing database configurations, such as indexing and tuning, can improve overall system performance. Regularly applying updates and patches provided by Atlassian also helps in addressing security vulnerabilities and improving system stability.

The correct option is "1. Workflow." Workflows in JIRA define the series of statuses and transitions that an issue goes through during its lifecycle. By configuring a workflow with review steps, you can automate the process of ensuring that all new feature requests pass through a review before implementation. This helps maintain quality and consistency in the development process.

JIRA Data Center offers high availability, scalability, and performance improvements over JIRA Server, making it suitable for large teams. It provides features like active-active clustering and horizontal scaling, ensuring uninterrupted access to JIRA even during maintenance or failures.

Common issues that large teams might face when using JIRA include difficulty in maintaining consistent workflows across multiple teams. This can lead to confusion, delays, and inconsistencies in project management processes.

Bulk Move in JIRA changes the projects of multiple issues, allowing them to be moved between projects. On the other hand, Bulk Edit modifies the field values of multiple issues without changing their projects. Understanding this distinction is crucial for managing issues effectively in JIRA.

JIRA Automation can be configured to send automated email notifications based on specified triggers, such as newly created issues assigned to a particular user. This feature fulfills the requirement efficiently.