Federation throwing 500 Server error after IP change to Policy servers

Document ID : KB000096870
Last Modified Date : 06/06/2018
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Our SiteMinder Policy servers were moved to a different datacenter and got new IPs, we changed the SMHost.conf but agent is still throwing 500 errors.
Logs were showing that the LLAWP service was receiving the ACO and HCO objects, but was failing to make a connection to the Policy Servers.

[2688/2708][Wed May 16 2018 13:13:45][agentcommon][INFO][sm-FedClient-00010] Administration Manager is trying to create configuration for the SiteMinder Agent
[2688/2708][Wed May 16 2018 13:13:45][agentcommon][INFO][sm-FedClient-00010] Creating agent connection using file : <redacted>\WebAgent.conf
[2688/2708][Wed May 16 2018 13:13:51][agentcommon][INFO][sm-FedClient-00010] Registering the Configuration Manager with the Policy Server
[2688/2708][Wed May 16 2018 13:13:53][agentcommon][INFO][sm-FedClient-00010] The doManagement Thread failed as the Policy Server could not be reached. Reason: Agent API No Connection
[2688/2708][Wed May 16 2018 13:13:54][FWSAdministrationManager.java][ERROR][sm-FedClient-00050] Error initializing Federation Web Services: Failed to create agent configuration for : <redacted>\WebAgent.conf
[2688/2708][Wed May 16 2018 13:13:54][FWSAdministrationManager.java][ERROR][sm-FedClient-00060] Federation Web services initialization FAILED. ()
[2688/2708][Wed May 16 2018 13:13:54][ManageNameIDService.java][INFO][sm-FedClient-01520] SAML2 NameID Management Service has been successfully initialized.
HCO needed to be updated with correct IP addresses.