If your Omnissa Horizon 8 implementation uses a Unified Access Gateway appliance, users use client drive redirection with the PCoIP display protocol, and the Omnissa Horizon Client and Horizon Agent machines are on different networks, the Horizon Tunnel must be enabled for the Unified Access Gateway appliance.
To enable the Horizon Tunnel, in the Unified Access Gateway admin UI, set the Enable Tunnel setting to Yes.
If you do not enable the Horizon Tunnel, users cannot use the client drive redirection feature with the PCoIP display protocol. Client drive redirection works with the Omnissa Horizon Blast display protocol, regardless of whether the Horizon Tunnel is enabled.
For more information, see the Unified Access Gateway documentation.
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