Did anyone come up with a definitive set of hardware to try?
I'm having the same issue...failing over to network mode. New 2016 Proxies, fully patched.
I've tried the following proxy configs:
Install 2012R2 from template (2xLSI logic SCSI adapters), add VBR proxy and it works fine with HotAdd.
Change win2016 2xLSI logic to 2xVMware Paravirtual and it fails to network mode.
Change win2016 to remove 2nd SCSI adapter and it fails over to network mode.
Im starting to think i should just replace my proxies with 2012R2 vms and be done with it. Might be easier than trying to figure out the 2016 mystery. This is my first attempt to using 2016 as a proxy server. All other proxies in my environment are 2012r2 or 2008r2.
And, yes, i did the diskpart automount steps.