Possible Duplicate:
Can you help me with my software licensing question?
I've Windows 2003 SBS and 40 CAL licenses for SBS. I also have Microsoft Exchange 2007 license for 2nd server which acts as front-end for Exchange (outbound/inbound emails come thru it and OWA works on it).
Does it require separate CAL's for Exchange 2007 even thou SBS has all mailboxes etc?