Document, please for the love of God, why the hell is there admins and I.T. guys out there that still do not document! I mean WTF. Do they realize how much of a pain in the ass it is to arrive at an Enterprise Company and not have any documentation to go off of?
9/10 of all the businesses I have worked for have little to no documentation. Most of the time it's the admin who claims, "why do I need to document,it's in my head." This frustrates me so much!
Most of these business that don't have documentation, ask me to then provide Documentation for them, although it gets old, this actually helps me to learn the infrastructure very quickly.