Enabling Microsoft seamless window mode for a published application is possible only if a client connects to a compatible server, such as Windows 2008/2008R2.
Please refer to vWorkspace documentation for a full platform requirements list.
Microsoft seamless window mode requires the following steps to be performed:
1. "Use Microsoft Seamless window mode" option should be enabled for a published application in vWorkspace Management Console.
2. RDP 7.0 update should be installed on Windows XP and Vista clients: http://support.microsoft.com/kb/969084.