In order for the Passwork Manager websites to be accessed outside of an internal network, reverse proxy and HTTP referring could be leveraged for an external URL.
Is this scenario supported?
Yes, this is a supported configuration.
There is no special configuration necessary within Password Manager or IIS in order to support this configuration. The reverse-proxy must be configured to redirect to the correct internal URL, on the correct port (80 or 443), and with session persistence.
For more information on configuring a reverse proxy, please contact the vendor or consult vendor documentation.