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Whenever a client manipulates (anything but read operations) a videoappointment video appointment in the eHealth Infrastructure the microservice responsible for wrapping the VDX endpoint is invoked and communicates with the VDX endpoint. As such, it is transparent of the clients of the eHealth Infrastructure that they communcate communicate with the actual VDX endpoint. This also means that the eHealth Infrastructure acts as a cache for the VDX endpoint which in turn means that the security model for accessing videoappointments video appointments is governed by the rules listed on Tokens, roles and RBAC/ABAC (the ruleset for accessing video appointments follows the same rules as for regular appointments).