Symptoms

Consider the following scenario:

  • User A schedules a Microsoft Lync 2010 conference by using Outlook, and then user A invites user B to the conference.

  • The Simple Mail Transfer Protocol (SMTP) address of user A contains both uppercase and lowercase letters.

  • The SMTP address of user B contains only lowercase letters.

  • User A and user B both have the update installed that is mentioned in Microsoft Knowledge Base (KB) article 2496325.

In this scenario, the Presence calendar data of user A is not changed to In a meeting successfully during the conference.

Cause

This issue occurs because of an error when the calendar capability of the user A is processed. The error is caused by a case-sensitive comparison of the SMTP address.

Resolution

To resolve this issue, install the following cumulative update:

2571543 Description of the cumulative update package for Lync 2010: July 2011

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