vRealize Business for Cloud and vRealize Automation connection fails, which results in data collection failure.


After you register vRealize Business for Cloud with vRealize Automation, the vRealize Automation data collection displaysIaaS host unknown error and then the IaaS machine is not reachable from vRealize Business for Cloud.


This problem occurs if the timeis not synchronized between vRealize Automation virtual appliance and the vRealize Business for Cloud vRealize Business for Cloud virtual appliance. The time difference between the two virtual appliances must not be more than 60 seconds.


For information about configuring Network Time Protocol (NTP), see the Configure Time Synchronization section in the Installation Guide.


  1. Configure the same NTP servers on both vRealize Automation and vRealize Business for Cloud virtual appliances.
  2. Restart the virtual appliances.