Hi, I am little new to cisco works, and unable to find log that can show me which devices had IOS upgrade in last 1 month or year etc.
is it possible to check from cisco works? if yes, where exactly.
There is a report called "Change Audit Report". Among other things, it will tell you:
Software Management—The Software Modification History report is displayed.
This window shows the changed software image details.
I'm not sure if it will tell you if the software was upgraded "manually" (i.e., not as part of an LMS-initiated job).
Have a look at this link and see if it does what you're looking for.