title: How can I change the user identity that runs a build agent in TeamCity?
body: <p>I am trying to get a build process set up in TeamCity 5, and I am encountering an access denied error when trying to copy some files.  I see that my build agent is running as "SYSTEM" now, and I think that's part of the problem.  I'd like to change that user identity.  The trouble is that I can't figure out how to change those settings on the build agent.  How can I change the build user identity?</p>