While setting up a SQL AlwaysOn Availability Group I ran into a very interesting problem.
I had created the AG while preparing for an upcoming speaking engagement so I'd setup two VMs (Node A and Node B) and checkpointed them immediately before creating the AG. This way I could just go back to the checkpoint and start the demo during my presentation.
This turned out to be very helpful because for the very first time I ran into an issue setting up a SQL AlwaysOn Availability Group. All previous configurations had gone flawlessly.