Avaya IP Office: URI contains invalid FQDN. DNS resolved address does not match the Interface address

The message URI contains invalid FQDN. DNS resolved address does not match the Interface address is displayed when accessing an Avaya IP Office via HTTP using its FQDN.

The message is not shown when accessing the system using its IP address.

Verify the IP Office system has DNS server(s) configured such that it can resolve itself correctly.

To configure DNS:

1. Login to the IP Office system using IP Office Manager.
   
2. Expand System.
3. Select the DNS tab and configure one or more DNS servers.
4. Save the configuration and test.