vRealize Application Remote Collector Configuration Fails

An error occurs when you add a vCenter Server while configuring the vRealize Application Remote Collector.

Problem

Configuration of vRealize Application Remote Collector fails with the following error:

Unable to establish a valid connection to the target system. 
Wait for response of Task ‘Test connection’ is timed out for collector 
‘vRealize Operations Manager Collector-Master’. 

Solution

• Enable the relevant ports.
• Ensure that vRealize Operations Manager and vRealize Application Remote Collector have the NTP synced.