If you mean that they actually cannot be encrypted by bitlocker, then I would report on the TPM Module version of the computers, as that is usually the determining factor for what can be encrypted or not. Generally TPM has to be 1.2 or higher for bitlocker to work. You could do a group policy (I think, its been quite a while) to "allow bitlocker without a compatible TPM" - Make sure though, to make a report that shows everything so that 1) you dont' forget they are there and 2) for compliance and security reasons.
Here's a report you can mess around with:
Select Top 1000000 tblAssets.AssetID,
tblAssets.AssetName,
tblAssets.Domain,
Coalesce(tsysOS.Image, tsysAssetTypes.AssetTypeIcon10) As icon,
tblAssets.IPAddress,
tsysIPLocations.IPLocation,
tblAssetCustom.Manufacturer,
tblAssetCustom.Model,
tblTPM.SpecVersion,
Case
When tblTPM.IsActivated_InitialValue = 1 Then 'Yes'
When tblTPM.IsActivated_InitialValue Is Null Then Null
Else 'No'
End As Activated,
Case
When tblTPM.IsEnabled_InitialValue = 1 Then 'Yes'
When tblTPM.IsEnabled_InitialValue Is Null Then Null
Else 'No'
End As Enabled,
Case
When tblTPM.IsOwned_InitialValue = 1 Then 'Yes'
When tblTPM.IsOwned_InitialValue Is Null Then Null
Else 'No'
End As Owned,
tblOperatingsystem.Caption As OS,
tblAssets.SP,
tblEncryptableVolume.DriveLetter,
Case
When tblEncryptableVolume.ProtectionStatus = 0 Then 'OFF'
When tblEncryptableVolume.ProtectionStatus = 1 Then 'ON'
Else 'UNKNOWN'
End As ProtectionStatus,
tblAssets.Lastseen,
tblAssets.Lasttried,
Case
When tblPortableBattery.AssetID Is Null Then 'Desktop'
Else 'Laptop'
End As [Desktop/Laptop],
Case
When tblTPM.AssetId Is Null Then 'noTPM'
Else 'HasTPM'
End As HasTPMorNot,
tblTPM.IsEnabled_InitialValue,
tblTPM.IsOwned_InitialValue,
tblTPM.ManufacturerVersionInfo,
tblTPM.ManufacturerVersion,
tblTPM.ManufacturerId,
tblTPM.PhysicalPresenceVersionInfo
From tblAssets
Inner Join tsysOS On tsysOS.OScode = tblAssets.OScode
Inner Join tblOperatingsystem On
tblAssets.AssetID = tblOperatingsystem.AssetID
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tsysIPLocations On tsysIPLocations.LocationID =
tblAssets.LocationID
Inner Join tblState On tblState.State = tblAssetCustom.State
Left Join tblPortableBattery On tblAssets.AssetID = tblPortableBattery.AssetID
Inner Join tblTPM On tblAssets.AssetID = tblTPM.AssetId
Left Join tblEncryptableVolume On
tblAssets.AssetID = tblEncryptableVolume.AssetId
Where (tblAssetCustom.Model Is Null Or tblAssetCustom.Model = '' Or
tblAssetCustom.Model Not Like '%Virtual%') And
tblOperatingsystem.Caption Not Like '%professional%' And
tblEncryptableVolume.DriveLetter Like '%C%' And tblAssets.Lastseen Is Not Null
And tblAssets.Lastseen <> '' And tblState.Statename = 'Active' And
tsysAssetTypes.AssetTypename In ('Windows')
Order By tblAssets.Domain,
tblAssets.AssetName