I have installed Lync 2013 standard and all is good though looking for some direction.
My internal domain is Domain.local which is making it an issue when I want to message someone. As it looks at the users email address which is domain.com.
If I message someone and search for MrX@domain.local it works fine. Though if I message someone searching the address book... firstname.lastname@example.org it fails to deliver or verify their presence.