All I am still experiencing this issue does anyone have any ideas. It is still only certain hosts that can not access update manager and the only thing on the client side from any of the logs is below.
[startup ] 2013-06-24 08:47:54 Log for Update Manager Client, pid=3616, version=5.0.0, build=build-432001, option=release
[QuickInf] 2013-06-24 08:47:55 Server url= https://ip:8084/vci/sdk
[QuickInf] 2013-06-24 08:47:55 File upload url = https://ip:9087/vum-fileupload/
[QuickInf] 2013-06-24 08:47:55 Initializing connection to VUM server on address https://ip:8084/vci/sdk
[QuickInf] 2013-06-24 08:48:18 The plugin was unloaded