Hi!
I found the bug in HTML5 vSphere client:
Users with standrad role named "virtual machine user" on folder or VM cantconnect or disconnect VM network adapter - got error no permissons.
If i give devices modify rights - users cant disconnect network, but cant connect it again - got error like *unable to connect device ethernet-0
Only if i give readonly rigths to all distributed switch port groups VM network connect-disconnect works.
In Flash client ALL OK with standard "virtual machine user" rights on folder/vm!!!
Tested in vSphere 6.5 U3 and latest 6.7 - all bugged!