IIS URL Rewrite: Remove WWW from domains on HTTPS

Question

I have a server with IIS 7.5 with the URL Rewrite module installed. I'm able to redirect http://www.mydomain.com to https://mydomain.com. Note HTTPS; secure.

However, if a user enters the secure url https://www.mydomain.com I'm not able to remove www! How come?

I would like a regex method to do this, so It can be a general solution instead of a hard coded one.

My general regex pattern is (.*)

And for my conditions, I have only one: {HTTP_HOST} , type: Matches the pattern, Pattern: ^(www.)(.*)$

My redirect url is: https://{C:2}/{R:0}