Error "The vNetwork Distributed Switch configuration on some hosts differed from that of the vCenter Server."

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.