Assume that you install Microsoft Lync Meeting Add-in for Microsoft Office 2013. When you create a Lync 2013 meeting in Microsoft Outlook, you may encounter the following issues:
If you copy a Lync 2013 meeting URL from an appointment to another appointment that has a different uniform resource identifier (URI), a mismatch occurs between the meeting expiry time and the appointment item end time.
Assume that you copy a Lync 2013 meeting URL, and then you discard the appointment for the meeting. After you send the meeting invitation, people will receive the invitation that does not have an URL.
If you change an appointment item of the meeting in an endpoint that is not integrated with Lync 2013, a mismatch occurs between the meeting expiry time and the appointment item end time.
This issues may occur because copy-paste Lync meeting URLs between different appointments breaks the contact between the Lync 2013 meeting expiry time and Outlook appointment end time.
To resolve these issues, install the following updates: