I'm a bit confused, you mention cloud but also a BE4K which is on-prem. Can you clarify? Do you have premise equipment that your partner manages? I ask because I work for a partner, and with our Cisco cloud platform, you would still have access to CUCM where your admin rights would allow you to administer self care portal. The link you shared looks like you have end user rights only to the portal?
BE4K is a locked down version of CME/CUE that is cloud provisioned & controlled.