If you have a small environment, or just want to see a sample of the information that will be in the report, run the following from a Windows server with the AD PowerShell module installed:
Get-ADComputer -Filter * -Properties OperatingSystem,OperatingSystemServicePack | Format-Table Name,OperatingSystem,OperatingSystemServicePack -wrap -auto
The report includes all AD-joined computers in the domain. The example above shows a mix of Windows, Linux, and Mac computers. Where
OperatingSystemServicePack is empty, it means there is no Service Pack installed (Windows computers), or there is no DirectControl agent installed (Mac or Linux/Unix).
In most cases there are too many computers for the PowerShell output to be easily readable. In these cases, you will want to Export the report of agent versions to a CSV file.