Hi @ChannelTapeFibre,
Your tennant will probably not be aware of the management IP of your device (also not the admin password).
Another way to avoid Santricity management to work properly is to filter via (firewall for instance) access from initiator/host to port 2463 which is a requirement for Santricity Management to work.
And last but not least I think (not sure about this) that with the new generation E2800 you can only manage them via Santricity System Manager (the embedded web management application).
Hope this helps.
Pablo