If you have a big Configuration Manager environment and you don´t have a monitoring solution like SCOM or NAGIOS, then PowerShell can help you too. This script queries all Management Points from SMS_SystemResourceList WMI class and it will check MPCERT and MPLIST website status.
If you want to use this script then run it on your Central, CAS or Primary Site Server like this:
Get-CMSMPStatus.ps1 -SiteCode PS1 -SiteServer Localhost -OutPut c:\Temp\MPStatus.csv. This will create a CSV Report (example below)
This script should work with PSH v2 and v3.
You can download the code example from here