Is there a way to bypass the "domain check" of the installer, so I can install AuthLite to a system image and then join it to a domain later?
As of version 2, AuthLite can only be installed and operate on domain-joined member machines.
But if you are creating system images, the machine on which you are creating the image is not joined to a domain yet.
Starting with v2.1.18, you can specify the MACHINETYPE property on the command line to cause the installer to assume the machine is domain-joined and install the proper components.
Possible machine type values:
Note that during a domain controller install, the installer normally installs any necessary schema updates and adds a data store replica to the DC. This means if you are pre-staging an image that is not yet a domain controller, you should also specify the options:
CREATESCHEMA=0 CREATEPARTITION=0 ADDLOCAL=DataManager
(Note that the last item prevents the installation of a replica. If ADDLOCAL contained the term "Replica" then it tries to create a replica)