The following urls are used by Version 9 during different stages
If your school uses a Proxy server then a proxy by-pass will be required for each url;
https://timetabling.education
https://timetablingmainsite.blob.core.windows.net/productupdates/Version9/updates.ini
https://timetablingmainsite.blob.core.windows.net/productupdates/Version9/TimetablingSolutions.msi
https://timetablingmainsite.blob.core.windows.net/releases/v9/TimetablingSolutionsV9.msi
https://login.salesforce.com/services/oauth2/token
https://timetabling.my.salesforce.com/services/data/v45.0/query