Avamar: VM image backups fail "No Proxy" due to proxies not resolving in DNS

The Activity Monitor in the Avamar UI shows 'No Proxy'

On-demand VMware Image backup fails with:

Category: APPLICATION
Severity: PROCESS
Summary: Failed to initiate virtual machine backup or restore.
Event Information:
Event Code: 30931
Category: APPLICATION
Severity: PROCESS
Summary: Failed to initiate virtual machine backup or restore.

If a group backup request is initiated.
 

1. Open a putty to the proxy - Note if the hostname shows 'localhost'
2. Verify that the proxy can resolve its FQDN, shortname, and reverse IP lookup to the DNS server by running:
   1. nslookup proxydnhostname .domain.com
   2. nslookup ###.###.###.###
   3. *Also verify that the Avamar Utility Node can resolve the proxies FQDN, shortname, and reverse IP lookup
3. If the proxy cannot resolve its hostname to DNS, verify that there are no DNS issues or network-related issues with the IP or gateway.
4. After the DNS issues are resolved, try re-registering the proxy. See the Avamar VMware users guide.

• Avamar VM image backups fail with "No Proxy" because no proxy servers are configured to protect the datastore holding the client’s VMDKs
• Avamar VM image backups fails with "No Proxy" error due to an interruption to the vCenter connection
• Avamar VM image backups fails with "No Proxy" error due to the VM not having any hard disks
• Avamar VM image backups fails with "No Proxy" error due to the proxy being powered off in vCenter
• Avamar VM image backups fails with "No Proxy" error due to the proxies not resolving in DNS