Symptoms: In vCenter you are seeing the following message been reported for one or more Hosts
Problem: This message can appear if the Host has not synced with the vCenter Database in over 5 minutes, or if vCenter Server or an ESXi host has been recently restarted
Solution:
In the Inventory section, click Home > Networking.
Select the vDS displaying the alert and then click the Hosts tab.
Right-click the host displaying the Out of sync warning and then click Rectify vNetwork Distributed Switch Host.
