The service portal can be found here: https://cern.service-now.com/service-portal/
The service management tool production site can be found here: https://cern.service-now.com/
The service management tool training site can be found here: https://cerntraining.service-now.com/
The service management tool test site can be found here: https://cerntest.service-now.com/
The help and standard training material for service-now can be found here: http://wiki.service-now.com/
The CERN training material can be found here: https://test-static-04.web.cern.ch/wiki/training-material
The project collaboration site can be found here: https://cern.ch/sm; It contains reference material and lots of details for staff involved in service delivery. It has restricted access.
The GS-SMS group site can be found here: https://cern.ch/gs-sms