Get dedup status:
Get-DedupStatus
Get dedup status formatted & additional info:
Get-DedupStatus | fl
Get dedup status for specified volumes:
Get-DedupStatus -Volume "D:","F:"
Show Dedup Metadata (How deduplication is being used) on the server:
Get-Dedupmetadata
Show Dedup Metadata for specified volumes:
Get-Dedupmetadata D:
Enable Dedup Job:
Start-DedupJob D: -Type Optimization -Full
Disable Dedup Job:
Start-DedupJob -Type Unoptimization -Volume <Desired-Volume>
Ref: https://docs.microsoft.com/en-us/windows-server/storage/data-deduplication/whats-new