The IoA intranet and old website are only available when your device is 'inside' the University Data Network (UDN). Devices are considered 'inside' when connected to the wired or wireless network within the University, or any UIS-managed VPN (including the University VPN) when way from the Univeristy.
To log into the IoA intranet you will need your University account (previously Raven account), the account needs to be in the ioa-network-access Lookup group. Email the IoA helpdesk if you are unable to access the IoA intranet.