Hi,

I am currently looking for a way to determine if an action run by SCCM on a client machine has completed successfully

Basically this environment has alot of machines and users and we have an app that wake the machines up at night and updates them. The sccm action IDs that will be run are {00000000-0000-0000-0000-000000000121}
{00000000-0000-0000-0000-000000000114}

I need a way to determine if these commands have completed and if they have passed or failed.

Does anyone know a log file that might contain this information that I can read, or is there some place else that I can get it from ?

Apologies if this is not the correct section, first time posting.

Any help will be greatly appreciated.

So do you really want to connect to "alot of machines" and parse logfiles? ...121 would be AppEnforce.log and ...114 UpdatesScan.log. 

i would use Now micro right click tools to perform the client actions and others .It tells you whether the client actions are initiated successfully or not. This tool also gives you window with how many are success and how many are failed further which you can troubleshoot on failed clients.

WMI client actions http://www.systemcenterdudes.com/configuration-manager-2012-client-command-list/ and its logs can be found https://technet.microsoft.com/en-us/library/hh427342.aspx 

What exactly are you trying to track here and why? Why does it matter if one of these actions succeeded or failed? How are you running them in the first place? Is there some dependent activity that you truly care about?