Windows server 16 with a website

My windows server 16 has: IIS and DNS

My local server is obama.local and I host a website call www.obama.work:443

The external clients can access the website without any problem

The internal clients can't access the website

Is there a way to configure my Fortinet to access the website in the intranet and internet using the external IP address.

My external IP address is: 168.123.110.93

My internal IP address is: 10.0.1.20

A user in the internal can access the webserver https://www.obama.com without any problems

A user that is in the intranet using https://www.obama.com is getting an error ERR_CONNECTION_TIMED_OUT 

Looks like the creation of a virtual server is use to redirect the port from 80 to 443 but I am not sure if this is what I need?