The virtual machine that my store runs on was migrated to a new host. Nothing inside the VM was changed and so all ip addresses are the same. What was changed was the dns pointer IP address associated with the store subdomain.
store : http://portal.mysite.com (new ip)
site: http://mysite.com (new but different ip, was always different then store)
What happens is the customer gets the login page, enters their login information and are immediately redirected back to the login page without any errors.
We have cleared their local caches and i’ve cleared the server caches as well but i can not figure it out.