SCCM configuration baseline - unknown state "client check passed\acive"

CIDownloader.log - details about configuration item definition downloads, You need to search by GUID. You can find this GUID from SCCM console, under configuration baselines - show column: CI Unique ID

DCMAgent.log is the log located on client in which You can find when specific baseline was run last time, below example line from log:
DCMAgentJob({698E2389-8394-491E-91DA-FB9C7222F173}): CDCMAgentJob::SetupJob - Add assignment Java Installation IsValid_All Windows 7 Computers Active({554557FF-3A41-49FB-BAA9-672B5A3510FF})

Java Installation - is the name of baseline

DCMAgent.log - next log to check on client

Status:
'Client check passed/Inactive' means these are machines which were previously responding to SCCM but are currently switched off, unplugged, offline etc.

'Client check passed/Active' 
"Unknown" is not a good name for this, for each system, a deployment's status starts as "Unknown", moves to "In-Progress", and finishes as "Compliant". 
Most like computers need to be restarted, pending restart after windows updates installation etc.