POST https://sso.employer.com/serviceredirect/login?service=https://actualserviceurl.employer.com/my/service
Accept-Encoding: gzip
User-Agent: myagent
Content-Length: 0
Content-Type: application/x-www-form-urlencoded

(no content)
HTTP/1.1 200 OK

[...]

HTTP/1.1 302 Found
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Date: Fri, 22 Nov 2019 13:20:31 GMT
Pragma: no-cache
Via: 1.1 login.1and1.org
Location: https://actualserviceurl.employer.com/my/service?ticket=xxxsuperlonggeneratedticketidxxx

[...]