You asked us to post in here too:
Please allow the ability to redirect to another Zendesk url when requesting another one. The purpose of this is when a URL is no longer used but users may still have bookmarks to it, the retired url would redirect to another url. - Patrick Richards, 2013
See full thread here with 17 comments requesting this feature.
I have been requesting this since 2017. When will this functionality be added? It already exists on Wordpress.