Connect to vSphere

Connect-VIServer 'vsphereURL.domain.com'

Get Multipath settings for all hosts

Get-VMHost | Get-ScsiLun -LunType Disk | Select VMHost,CanonicalName,MultipathPolicy

Get Multipath settings for a specific host

Get-VMHost "<VMHost-Name>" | Get-ScsiLun -LunType Disk | Select VMHost,CanonicalName,MultipathPolicy

Get Multipath settings that match a specific string

Get-VMHost | Get-ScsiLun -LunType Disk | Select VMHost,CanonicalName,MultipathPolicy | ? {$_.MultiPathPolicy -like "Fixed"}