I have installed a fresh version of FSPBX. I am familiar with FusionPBX. I am struggling to understand the right way to implement multitenancy. What is the difference between domain and company? I can create a domain the "old" way under Advanced. But I don't see it as an option to select on the home page where "Admin Domain" appears. If I click on that, it asks to "select company" but my newly created domain is not there. Can anyone point me in the right direction?