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In the Vicon Server Name field, enter the IP address of the first adapter on the Vicon machine, followed by a semi-colon, and then the address of the second adapter.
In the Port Number field, enter either 801 (for Tracker) or 804 (Evoke or Shogun).
To check that your connection has been successful, in Unreal Engine 4, on the Window tab, point to Developer Tools and then click Output Log and review the results.