During Azure "Import Setup", add "Company Name" to classification options
Long story short: Add "Company Name" to the list of classification options during Azure AD Synchronization Setup
JUSTIFICATION
When trying to use the "Import Setup" step of the Azure AD sync, only "Office" and "Department" are listed as options for identifying which Site to add the users to. In our business case I'm over IT for 6 separate operating entities under one umbrella company (each daughter company has its own set of offices and departments so using either of these fields would get messy fast). On top of this, all of our companies work together to some extent, so we run all of IT through the umbrella company on a single Azure tenant with 500+ user accounts.
What we really need is the ability to create each daughter company as a "Site", and have the "Company Name" field available to select during the "Import Setup" stage as a classification option. Our AD users have this field populated and this would allow us to organize Atera to work with the way our company operates. We plan for each holding and daughter company to be its own "Site". Without this option the usefulness of Azure AD sync is greatly diminished for us.