If Appear Offline is not enabled in your Lync app, here is how you can enable the option.

Navigate to the following registry (regedit):

\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator

Right-click on Communicator, add a DWORD called EnableAppearOffline (32bit) and give it a value of 1.

Restart Lync and the status should be there.