Individual bookshelf accounts in Ebook Central broken after move to ADFS

Hi all,
Last year I set up a group in EZproxy for Ebook Central which forces all users to login on campus, avoiding autologin. This meant that all users would access their own personalised account.
2 weeks ago we moved our authentication to ADFS, and now whether I'm on or off campus, I am logged into a generic bookshelf in Ebook Central that all users have access to. So they have lost their personalised account. So whatever the anonymous identifier was that EZproxy was sending to Ebook Central for user accounts, it is not longer sending that.
Does anyone have any idea how I can fix this?
Thanks,
Petrina

[cid:[email protected]]<https://www.cqu.edu.au/>
Petrina Collingwood - BMus (UQ), MMus (QUT), MInfoMgt (QUT), MComp (RMIT)
Digital Access Specialist | Information and Technology Directorate
CQUniversity Australia, 20.12, 160 Ann Street, Brisbane Qld 4000
P +61 7 3023 4135 | X 54135 | E [email protected]<mailto:[email protected]>

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