Endpoint Protection

I understand that Proactive Threat Protection is not supported on server OS's and is displayed as OFF in the gui. My question is are there any issues with it being installed? Should that component be uninstalled or is it ok to leave it but just "off".

Is there a performance hit or just the potential of scanning a potential key logger, etc?

 There's no harm installing PTP on server.
PTP won't run however Application and Device Control gets installed with PTP.

There are no performance issues with it.

No harm in leaving it 'Off' .. But you have to consider the utilization... LiveUpdate will download definitions for this component as well... and also COH drivers will be installed unnecessarily, though they wont stay active.... So, I'd personally suggest to blow it off.... I mean, the PTP... :) ... Lets be happy if AVAS works fine.. :) .. lol..

I install the full package to everything, including PTP on servers.
It won't run, and so far, I can't see any negative impact. I've tried it both ways, and on the servers we have some weird issues with, leaving it off, or installing ONLY the AV made no difference at all. So I can't even blame weirdness on PTP being there but ot active on servers.
It sees it's on a server and won't run.
Easier for me to keep as few distinct builds or packages as possible since I'm it as far as SEP here, along with 100 other hats.

So, I guess - it's a personal choice, IMO.......... no harm either way that I see.