Integration with Exchange Online (Office 365) where http connections are not allowed


Can anyone assist in this?

I have a site that based on FCA regulations have turned off any HTTP access to their servers.

When you install the exchange integration you have to access via http://localhost/CRM.

If I change the settings to allow the integration to be configured BUT then change it back I believe that the exchange integration will fail.

Does anyone know if there is a way of getting this working when only https connections are allowed?