Lync 2013 Client IMWarning / Disclaimer issues with Special Characters

IMWarning is a message that is showed every time a chat windows is opened. This is a new feature on Lync Client 2013 Basic and Full, since the RTM version has a limitation to show Special Characters. In Portuguese, for instance,  “Atenção” contain the ç and ã characters which will not be correctly displayed in Lync 2013 Client. To test this I use the following characters sequence:

Set-CsClientPolicy -Identity Global -IMWarning “ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ”

In Lync 2013 Client with Cumulative Update 2 (15.0.4517.1004) or lower we will get this:


Just as a comparison, in Lync 2010 Client you will receive the proper message:


If we analyze a Lync Tracing on both clients (2010/2013), a property is found:

<property name=”IMWarning” >



This means that Lync 2013 Client is receiving the same property as Lync 2010 Client, but somehow it gets messed up while displaying it.

Lync 2013 Client Cumulative Update 3 fixes this issue, therefore we can update using the steps described in:

Description of the Lync 2013 update 15.0.4535.1510: October 8, 2013 (KB2825630)

And now we will have all special characters properly displayed:


More information:

Extended character is displayed incorrectly in a disclaimer in Lync 2013 (KB2882814)