Local IIS is also handy for testing out certain permission-related issues, since the built-in web server sort of runs as you (I say 'sort of' because of a long story I'm not going into right now, but ...
I need help in a serious way. I have spent the last 4 months developing a major web-based application for the bank that employs me and it is time to go to testing. Here, we have three environments ...