Any plug-in program available for download and installation may not display on the Plug-in Manager console for the following reasons:
If Plug-in Manager is unable to download the plug-in program, it automatically re-downloads after 24 hours. To manually trigger Plug-in Manager to download the plug-in program, restart the OfficeScan Plug-in Manager service.
Select the ActiveUpdate server as the update source.
If you select Other Update Source, select the first entry in the Other update source list as update source and verify that it can successfully connect to the ActiveUpdate server. Plug-in Manager only supports the first entry in the list.
If you select Intranet location containing a copy of the current file, ensure the endpoint in the Intranet can also connect to the ActiveUpdate server.