I want to get alerts whenever someone makes any changes in web applications in Central Administration. How can I achieve this?
Could you please provide a bit more information so that experts can suggest you more relevant solution ?
Which SharePoint server you are using currently ?
You may checkout few good references mentioned below if it helps you to resolve your concern :
http://www.codeproject.com/Articles/431342/Auditing-A-Built-in-Feature-of-SharePoint
http://sureshpydi.blogspot.in/2013/05/audit-log-reports-in-sharepoint-2013.html
The resources helps to track the changes and get the reports for the same.
Meanwhile, if you wish to get such changes reports automatically, you can have a look on LepideAuditor suite i.e., (http://www.lepide.com/lepideauditor/sharepoint.html) that helps to track every critical changes into real time and provides the data even at granular level.
