Which report can confirm if a user has access to a target instance?

The Test Security Group Membership report is particularly useful for confirming a user's access to a target instance because it allows administrators to verify whether specific security groups include the user in question. By examining the security group's membership, administrators can ascertain the permissions and access rights a user has within a particular Workday instance. This report can be run against various security groups and is a straightforward tool for assessing user access in specific scenarios.

In contrast, while Access Rights Report provides a comprehensive overview of access rights across the system, it does not specifically target individual user instances in the same way the Test Security Group Membership does. The Security Compliance Report typically focuses on compliance with security policies rather than individual access verification, and the User Access Overview presents broader information about user access without the specific functionality needed to confirm access to a specific instance. Therefore, the focus and functionality of the Test Security Group Membership report make it the most appropriate choice for this purpose.