The request was to be able to load the domain within the web interface once we had done an email domain restore. I do see that the current version of SM has the "attach user" and "attach folder" options which enable us to restore files, however the instructions are not the same for loading a full domain (from a back up restore).

Example:
I want to restore c:\temp\domainA.com

You're online instructions say that I should be able to use "Attach user" or "Attach folder" by pointing it to c:\temp\domainA.com\Users\username or \Users\username\mail

https://portal.smartertools.com/kb/a2980/restore-a-users-account-folders-or-emails.aspx

But there are no instructions on how to import for full c:\temp\domainA.com domain.