We have not upgraded any of our Sierra machines to High Sierra yet but Apple finally started shipping macbooks with High Sierra and now we're trying to install safeguard 8.0.3 on our first HS machine and we're getting an error after we drag the client configuration zip file. Please see the picture for the error. I spoke to sophos support. I was told that there is an issue with Apple and AD sync which is causing this error. I find it hard to believe that I'm the only one who has report this issue so far. I'm able to install safeguard with a local username that's not a domain account.
Safeguard Management Center Version 8.00.2.16
Machine OSX version 10.13.2
Safeguard Client version: 8.00.3.9
Cert is SHA2 256
Installing as domain user
Filevault is not enabled