Create or reactivate multiple client employees' access across multiple client organizations in a single request.
Users and client organizations must already exist. This operation is synchronous. An
entry for an already-active employee binding succeeds without changing
access when the request matches existing access; otherwise, that entry
fails with AlreadyExists. Use Update Client Employee to fully replace
access for active employee bindings. When reactivating an employee,
supplied roles are applied and access omitted from the entry is not
removed.

Requires scope: organization:sync.