Thank you for all the votes and feedback. We have started work on this and the capability will be supported soon. If you would like to get in touch with us to discuss your scenarios, please fill this form: https://aka.ms/ApplicationGatewayCohortBrent commented
Wondering when this feature would be supported. We have 50k sub domains that we would like to do URL rewrites on right now we have to service them with VMs because of custom subdomain limit on webapps. I am looking for this feature for SSL. Main reason we have example Shop.User1.contso.com would like to change it to user1.contso.com/shop on rewrite. There is 3rd party products that can do it.