The following urls are used by Version 9 at various stages, if your school uses a proxy server a by-pass for each url will be required
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://eu9.salesforce.com/services/data/v45.0/query