This is an issue that we can get adding / removing permissions in the vCSA 6.0. We can also have issues searching for users / groups in the AD (using your identify sources). This is how one of the ways to handle this issues and fix it.
Teach the user how to install vSphere Update Manager
Console to Windows system: Install vSphere Update Manager: Configure vSphere Update Manager plug-in in vSphere Client: Verify vSphere Update Manager settings in vSphere Client:
Teach the user how to use create log bundles for vCenter Server or ESXi hosts
Open vSphere Web Client: Generate vCenter Server and ESXi host log bundle: Open vCenter Server Appliance Web Management interface and generate log bundle: Open vCenter Se…