Use the hyphen. If you press help to the right of UCI field, they explain this.My renewal application was delivered to IRCC June 24th, got AOR October 9th, still can't see it on ECAS.
I started doubting I am entering something wrong, as I see some people from June and July submissions here posting updates that their applications are now visible on ECAS.
Does everyone use UCI as the Identification? I just copy and paste the number from the AOR email, no hyphens.