FYI, SBS2011 is the end of the line for the SBS series according to MS. SBS -> full domain/exchange conversions are pretty miserable, I am in the middle of 2 right now and have done probably 10-12 in the past, they never go smoothly. If this is just for you to play around with at home that is fine, but if its for a company, I would do something else. Set up a normal domain and do a hosted exchange solution or something similar, it will save you a ton of headaches in the future.
SBS is fine to learn on, just be prepared for things to blow up in wonderful ways if you stray from the SBS console. There is a reason MS doesnt recommend Exchange on a domain controller or really having anything else running on that exchange box (sharepoint, etc).
Also, do yourself a favor... DO NOT USE .local (SBS default). Mac's hate this and cross forest migrations are a bitch. You can change it during the installation process.
This post went very sideways from the OP intention, but yeah, SBS is really on my bad side this month.