Hey I did a clean wipe of my wifes computer last night and went to reinstall office 365 as a part of her DET login and I keep getting this i have also tried on a few computers even when trying to view the
any help would be great how does she contact her administrator when its a massive department
That error is to do with how the organisation has enabled authentication for Office 365, it’s a problem probably only they can fix, though it's always worth trying a different browser to see if that makes a difference.
Contact the DET help desk, if that’s something you can find and mention these ‘ADFS errors’ with those screenshots and they can investigate. If it's a widespread issue they could be aware of it already and it may just start working again when fixed.