On a computer that is running Windows XP and that has Microsoft Lync 2010 installed, double-byte text (for example, Korean or Japanese text) in desktop alerts is transparent. Therefore, users cannot see the text.
This issue occurs because the font that is used for double-byte text in Windows XP is not a ClearType font. Therefore, the text is displayed as transparent text on a white background.
To resolve this issue, install the following cumulative update:
2670326 Description of the cumulative update for Lync 2010: February 2012
To enable this update, change the following registry keys.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows