Very little about skills, mostly about charming upper management. Tell an endearing story about your family and you are golden. Know basic knowledge on Active Directory and troubleshooting techniques and you are fine. You will interview with at 4-5 managers at least and the CEO, everyone must like your personality or they will deny you. Do your best to mirror their demeanors.

I was contacted by an internal recruiter. There was a phone screening and then brought in for an in person interview and then a second in person interview to meet people outside the IT group.