Host has lost connection to vCenter Server" alert for multiple ESXi hostsHost is in maintenance mode for at least 72 hours"Not Responding" in vCenter as per KB ESXi host disconnects intermittently from vCenter ServerVCF 9.0
Aria Operations 8.18.x
Take ESXi host(s) out of maintenance mode in vCenter.
You can use the following documentation as guide Place an ESX Host in Maintenance Mode in the VMware Host Client