When selecting a Lync meeting request Outlook 2013 opens a blank "Conversation" Page (Attached.)
This is happening to all clients. If a user copies the URL from the meeting, it resolves correctly. We can fix it by disabling and reenabling the LYNC add in for Office but it goes back to not working after a day or so. This is Office 2013 64 bit and Lync 2013. The DNS has been verified and it works outside of office.
Office has been reinstalled and the problem is never really fixed long term.