The WDS update reflects a refresh to the V2.6 build 2057 to build 2083 (02.06.0000.2083). This refresh provides a fix to correct cases where a user’s e-mail messages may not be fully indexed. The updated package can be installed over the V2.6, build 2057. A restart will be required in the case where you install over the earlier release (2.06.0000.2057). This update causes the index to be rebuilt.
Windows Desktop Search V02.06.0000.2083 | Windows Desktop Search Multilanguage User Interface (MUI) | Windows Desktop Search Group Policy .ADM file | Windows Desktop Search Administrator's Guide | Microsoft Windows Desktop Search (WDS) version 2.6 Changes | Enterprise Windows Desktop Search