Adding Comcast email account to iPad - “Comcast Unavailable” message

I cannot add my Comcast email to my iPad.  12.9” iPad Pro w/ latest iOS update completed

HOW I’VE TRIED TO DO IT: I select “Add Account”, enter correct account information, then tap “Next”.  The message “Looking Up Account” and “Verifying” appear briefly, then the “Comcast is currently unavailable” message appears.

PLEASE NOTE - Troubleshooting steps I have already tried and have not worked:

• Resetting network connections (General -> Transfer/Reset -> Reset Network Connections)
• Turning Off VPN (General -> VPN/Device Management)
• Changing to POP and resubmitting
• Restarting iPad

Thanks for your help.