Weird Airserver behaviour

[Sheridan]

We use Airserver to mirror ipads onto projectors and it generally works well. However we bought another 10 licences and have an issue where none of the ipads will connect to these PCs. We only use Airplay, and don't need broadcast enabled as we use the Scan QR code option - and this is currently working well on all vlan segments of our network. It doesn't work on the latest installs but they are all the same hardware (Zoostorm) despite the OS being identical to the working ones (W10 1703) - it just comes up with the connection failed error immediately after scanning the qr code.To test we swapped a failing one with a working one, and the fault followed, and the working one continued to work, which eliminates the networking side - so it looks like possibly software related. When we've checked they're all using the same version of Airserver, W10 and the NIC driver, and even more weirdly we have a few of the 'dodgy' PCs working fine with Airserver in another area of the school! So this suggests to me a missing/broken update, or something very specific but I've run out of things to try - anyone else had this kind of issue?

[AJWhite1970]

Which version are you running? 5.5.3 appears very stable for us, much better than previous versions (although I’m running 1709)

[Sheridan]

It happens on the older 4.4.9 and 5.5.3 - it just seems to affect certain PCs. Most are running 5.5.3 and like you, we've found this stable and reliable on most kit.

[bald_pig]

Could it be windows firewall blocking the connection?