Scenario: Multiple Organizations exposed internally and externally (IFD) as sub-domains of the same main domain.
Example Organizations: Org1, Org2, Org3
As far as certificate requirements, we can use a single wildcard certificate. The challenge is though that SSL can not be bound to .local domain, so the internal URLs will need to share the same domain. They will become:
You will find this kind of question a lot from on-premise clients that are now trying to integrate with a 3rd party solution (SaaS), and need to configure IFD.