Hi Shocko,
This product would help you monitor the boxes those services are running on themselves. Not the state of AD or Exchange as much as the CPU, I/O, Disk, etc.
If you're running the splunk APP for infrastructure, the license limit is whatever your enterprise license is but if you're truly running the INSIGHT (no other splunk install at all), you have a 200GB rolling retention license, which means you can retain the last 200GB of data you've ingested, which will keep information on your environment for quite a while.
... View more