VMware vSAN - Synchronizes all Storage Providers with the current State of the Environment

Whenever ESXi Hosts are added in the vSAN Cluster, these ESXi Hosts offers Storage Providers (One Per ESXi). These Storage Providers Provides Out of band information about the vSAN. If these are not communicating with SMS (Storage Monitoring Service) on vCenter, then vCenter will not be able to display any of the capabilities of the vSAN datastore. For this you need to run the re-synchronization operation. This can be triggered by:-
Select vCenter > Configure Tab > Storage Providers > Click on "Synchronizes all Storage Providers with the current State of the Environment"