Problem: VDI machine’s view desktops is shown unknown or provisioned missing state on Horizon View administrators of VMware Horizon 7 version 7.4.x.
This problem caused by missing VcCache updates due to socket timeout not happening then results in incorrect status in View Administrator page of VMware Horizon 7 version 7.4.x.
Restart of the connection server services will bring the VM’s back to correct status.
Fix is available in Horizon 7.5 version or contact VMware support to get hot patch with VMware Horizon 7.4 version.
VMware Knowledge Base: VDI intermittently shown as unknown (missing) state on Horizon admin page in Horizon 7.4 version (56903)