Redirect URI with Entra ID External ID Problem
Thanks for the replies. I think the solution to my problem was simply time!
My issue seems to have been that just pressing sync and also restarting the site, didn't sync all the changes.
As a 'developer in a rush' i was likley making additional changes when the original ones hadn't synced, and thus 'looked' like errors.
I haven't done anything different than i did in the document apart from wait, and much more than 15 mins.
Sorry for just a 'boaring' solution but i took me a week to figure this out.