IIS version numbers aren't listed in Add/Remove Programs, so will not be retrieved by software scanning.
This discussion seems to suggest that you can scan the file properties of inetinfo.exe to retrieve the IIS version number. General instructions for scanning file properties with Lansweeper can be found
here.
When you've scanned the file properties of the aforementioned file, you can run the report below to list the information you are after. Instructions for running reports can be found
here.
Select Top 1000000 tsysOS.Image As icon,
tblAssets.AssetID,
tblAssets.AssetName,
tblAssets.Domain,
tblAssets.IPAddress,
tsysOS.OSname,
tblOperatingsystem.Caption As FullOSname,
tblAssets.SP,
SubQuery1.FileVersion As IISversion,
tblAssets.Firstseen,
tblAssets.Lastseen
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tblComputersystem On tblAssets.AssetID = tblComputersystem.AssetID
Inner Join tsysOS On tsysOS.OScode = tblAssets.OScode
Inner Join tblOperatingsystem
On tblAssets.AssetID = tblOperatingsystem.AssetID
Left Join (Select tblFileVersions.AssetID,
tblFileVersions.FileVersion
From tblFileVersions
Where tblFileVersions.FilePathfull Like '%inetinfo%') SubQuery1
On SubQuery1.AssetID = tblAssets.AssetID
Inner Join tblServices On tblAssets.AssetID = tblServices.AssetID
Inner Join tblServicesUni On tblServicesUni.ServiceuniqueID =
tblServices.ServiceuniqueID
Where tblServices.Started = 1 And tblAssetCustom.State = 1 And
tblComputersystem.Domainrole > 1 And tblServicesUni.Name Like '%W3SVC%'
Order By tblAssets.Domain,
tblAssets.AssetName