Hi - I've seen this a few times on multiple Horizon versions, though at the moment i'm using Horizon 7.4 and WIndows 10

A user logs into Horizon and instead of passing through the credentials to Windows it then asks them to login again and shows the name of the last logged in user . This problem is intermittent but maybe 1/20 times

It only happens in Windows 10 , the pass through of credentials  is perfect in Windows 7

Horizon admin doesn't tell me much