Please allow federation with non-outlook enabled Skype accounts. Until federation works with every type of Skype login its a feature we cannot expose to our users do to this type of conversation:
"Please explain to your colleague they have to use a microsoft account when they sign in. No, no, they're not getting a new name, its the same Skype contact name, your friend just needs to sign in differently. On second thought, we've installed Skype on your PC, just use that. Yes, use Skype to talk to your Skype friends and Lync to talk to everyone else."