Information
Without establishing what types of events occurred, it would be difficult to establish, correlate, and investigate the events leading up to an outage or attack.
Solution
From the vSphere Web Client go to vCenter Inventory Lists >> vCenter Servers >> Select your vCenter Server >> Manage >> Settings >> Advanced Settings. Click Edit and edit the config.log.level setting to info or if the value does not exist create it by entering the values in the Key and Value fields and clicking Add.
or
From a PowerCLI command prompt while connected to the vCenter server run the following command:
If the setting already exists:
Get-AdvancedSetting -Entity <vcenter server name> -Name config.log.level | Set-AdvancedSetting -Value info
If the setting does not exist:
New-AdvancedSetting -Entity <vcenter server name> -Name config.log.level -Value info