Dell Unity: Cannot validate credentials "Please check your network settings" and "Need Support Credentials to get the contract information"

Unisphere UI is showing the following alert:

Support Credentials

Cannot validate credentials. Please check your network settings.

Support Contracts

Need Support Credentials to get the contract information.

Attempting to Check the Support Credential shows the following alert:

The support credentials have been saved, but cannot be validated because the
SSO server is unreachable. Check your network setting like DNS, proxy, firewall
and etc. Click Verify to check your credentials again after network problem is solved.
You could still atttempt configuring ESRS even not validated.

Dell Unity networking articles below were checked also:
Dell Unity: ESRS Master Knowledgebase Article (User Correctable)(Requires a Dell Support account to view this article)
Dell Unity: Network Ports Complete list. (User Correctable)

DNS not correctly configured on the array

Configure DNS Servers for the array.
This can be done from the Unisphere UI > Settings > Management > DNS Servers.

Example:

To configure the array management DNS Servers from UEMCLI, /net/dns/config is used.

Example

service@(none) spa:~> uemcli /net/dns/config --help
Storage system address: 127.0.0.1
Storage system port: 443
HTTPS connection

Specify the default DNS server addresses.
Actions:

[Set]
/net/dns/config set { -nameServer <value> | -auto | -noNameServer }

[Show]
/net/dns/config show [ -output { nvp | csv | table [ -wrap ] } ] [ { -brief | -detail | -filter <value> } ]
service@(none) spa:~>

service@(none) spa:~>uemcli /net/dns/config set -nameServer 192.168.xxx.12

Note to configure multiple DNS servers from the command line use a comma between name servers.

service@(none) spa:~>uemcli /net/dns/config set -nameServer 192.168.xxx.12,192.168.xxx.13

The Unity job task created for the change is titled "Modifying DNS Settings" in uemcli view and "
Modify DNS Server" in UI view.