Ensure that the DNS server has an Avaya Aura® Messaging server FQDN to IP address mapping entry.
If the DNS server does not contain the mapping, add a mapping entry in the following format to the /etc/hosts file located on the Usage Metering Collector server:
<IP address of Avaya Aura® Messaging server> <FQDN of the Avaya Aura® Messaging server>
For example, 10.100.10.100 aam.pu.ava.com
Ensure that the Avaya Aura® Messaging server FQDN mentioned in the DNS server or /etc/hosts file matches the CN present in the Avaya Aura® Messaging server identity certificate that you noted in Step 3.