Customer attempts to create a custom role that is limited to managing or accessing a single migration project.
Custom roles in On Demand Migration are defined at the organization level, not at the project level. As a result, permissions granted through a custom role apply across the organization according to the selected permission set and cannot be restricted to an individual migration project.
This behavior is by design.
Custom roles can be created to align with your organization's security and operational requirements by assigning only the permissions necessary for a user's responsibilities. However, these roles are available for use throughout the organization and are not tied to a specific migration project.
Once a custom role is created: