Follow the link in the email you receive inviting you to become an Event Administrator.

Register for an Oxford Abstracts account or log in if you already have an account.

When you log into the Oxford Abstracts home page, your first screen is your dashboard, which will show you what roles you have and what functions you have permission to perform.  If you have been set up as an Event Administrator for an event, you will see it listed in the 'Organising' section.  

Click on 'Go To Event' to view/edit the event.