All managed clients stopped communicating with the Management Server, machines are greyed out. (NETIQKB9835)

All managed clients stopped communicating with the Management Server machine (machines greyed out in the Operator console for the server object).
The IP Address of the AppManager Management Server was changed.

To resolve please run the Amadmin_ConfigSiteCommType Knowledge Script on each managed client machine switching the communication method from IP (default) to use name resolution.  Assuming DNS is in proper sync this should allow communication between the Management Server and the agent machines. The static records will remain until deleted. There are two ways to handle this deletion activity. Either of the methods listed below will suffice. 

• Stop the NetiQ AppManager Client Communication Manager service and start it with a -oa in the startup parameters. 
  
  For more information on cold starting the Agent Services please see:
  https://www.netiq.com/kb/esupport/consumer/esupport.asp?id=NETIQKB20149

Each AppManager agent machine keeps a static record in the local repository (local-repository.mdb) for the Management Server (MS) and IP address. Since the MS was assigned a new IP address the local repository will now contain duplicate records of hostnames with two different IP addresses.  This can cause a communication problem. By default AppManager communication is via IP address.

Formerly known as NETIQKB9835