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BugZero found this defect 3438 days ago.
The Infrastructure Overview report shows different values between vCenter Servers > Virtual Machines and Storage > Number of VMs.
Here are the possible causes of such behavior: one VM is linked with more than one datastore; for the "vCenter Servers" templates are not counted; "Storage" only shows the datastores and templates which were available during the time of the collection job.
This behavior is by design.