How do we pull a report listing all of our candidates who have set up job alerts through the career

Summary:

How do we pull a report listing all of our candidates who have set up job alerts through the career centre?

Content (required):

We are transitioning to a new system and would like to be able to advise all candidates that have setup Job alerts through us in the past that we will be moving to a new system so we do not lose the relationship.

Version (include the version you are using, if applicable):

Taleo Business Edition

Code Snippet (add any code snippets that support your topic, if applicable):