Assume that you sign in to Microsoft Lync 2013, and then you click the Conversations tab. In this situation, a meeting icon in the Conversations tab appears as a pie chart clock, and it is inconsistent with the meeting icon for the Meetings tab.
To resolve this issue, install the following service pack:
2817430 Description of Microsoft Office 2013 Service Pack 1 (SP1)
Article ID: 2919510 - Last Review: 25 Feb 2014 - Revision: 1