VMWare Horizon Client Remote Desktop Issue

I found a reference to error 0x00002f94 in a VMware link. Old bug related to a proxy fix but should be fixed in the 5.4 client back in 2020. We can see it does use port 443 for a secure HTTP connection. It connects to the tunnel server and then has an HTTP error. Maybe searching on VMNware community to see if there are more matches? I am not sure what browser is best/recommended for use with the client. In effect they should be pretty much the same with respect to behavior due to the standards. It has been a bit since I went fishing in the VMware community but there might be something there. 

The 464XLAT is the IPv4/IPv6 construct that T-Mobile appears to use. Some refer to it as CGNAT which is referencing for carrier grade NAT, network address translation. The behavior may have something to do with a change of how T-Mobile is doing the traffic handling over IPv6. You can see clearly in your client both IPv4 and IPv6 are active. i.e. the dual stack. In packet captures I have seen they tend to use IPv6 for types of multicast delivery. The whole IPv4 services over IPv6 is a bit complicated and does have limitations so port forwarding as with a more traditional IPv4 routing process is not possible. 

The way the VMware client sets up the "tunnel" communication to the server seems like it should work. It might be good to check with IT and see if they have done upgrades to the VMware environment in the office. Maybe the client needs to be updated. However, you stated that in the office it works so that sort of seems to rule that out. In another thread in the VMware community there is a reference to a change in the F5 configuration that may have been involved at one point. The tunnel seems to be established and then closed. Maybe something again related to the F5s and load balancing the traffic. I would try a different browser or two and see if the same behavior persists. Check the VMware community as well. I don't have an account in there now. I know this could be a rabbit hole so I might better grab a root and stop the fall. 😎