You have multiple Microsoft Security Copilot workspaces.

Security Copilot workspaces have membership and capacity associations. Before routing embedded experience traffic to Workspace1, User1 must be granted access to that workspace. Assigning a generic Security Operator role in Microsoft Entra does not make the user a member of the Security Copilot workspace. Disassociating capacity from the default workspace or creating more capacity does not resolve the user-access error. This domain is tested through precise scope control: tenant, subscription, resource, application, and data-plane authorization are not interchangeable. The correct choice applies the smallest identity or governance control that enforces the stated requirement. Options that only add users, create registrations, or provide broad administrator access fail because they do not directly enforce the requested access behavior. The result is a direct exam-style implementation choice: it changes the required security behavior without relying on unrelated monitoring, manual cleanup, or excessive privilege. Official Microsoft source/topic: SC-500 Study Guide > Security Copilot workspaces; Microsoft Learn > workspace access and capacity.

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