We need a monitoring solution in place. I know how to use both Nagios and System Center Essentials but the company I work for now wants to know the pros and cons for both. Other than managing updates and wanting to keep everything under Microsoft, is there anything that System Center Essentials can do in terms of monitoring that Nagios cannot do?

Hello Frank, I have no experience with Nagios. Just for your information, somebody disscussed this topic here: Nagios (OP5) vs Operation Manager http://www.myitforum.com/forums/Nagios-OP5-vs-Operation-Manager-m196767.aspx Hope it helps,Yog Li TechNet Community Support