Finally off the call - they are looking into this now. Is it normal practice for MS Tech Support to ask for a fiddler trace with HTTPS decrypt? It will send them me administrative password (I'm a global admin). I didn't ofcourse do this. The tech had the same issue on their side on their tenant so I told them to get a trace from their own tenant with their own global admin accounts to which they said they need a customer to do this. Really odd. I've never experienced this with technical support before.
Just thought I would pass this along since this could seriously jeopardize security for other tenants. MS shouldn't be asking for this if the password is going to be shown.
