Hi paulk_neilltsp,
Microsoft has released the Microsoft Lync for Mac 2011 14.0.7 hotfix for solving this issue:
“Presence status isn’t updated based on Outlook for Mac 2011 calendar in Lync for Mac 2011”
But it may receive additional testing, thus, it is not publicly provided. To resolve this problem, please refer to this article: support.microsoft.com/.../2926055
Best regards,
Young Yang