Hello @Brian Fraley! I would suggest to put a dummy email first and change the email on the notification field after you create the conference extension. Thank you!

Thank you for your reply but that is the wrong email address field, the one I am referring to is User Details, General Settings. The one blocked in red below. I have been told the problem has something to do with RingCentral's single sign on product. I do get why they might care if we used single sign on, but the failure in their logic is that every email address attached to a phone number will be logging in. We reuse an email for all of the conference rooms so that the emails go to one mailbox. I don't know what emails go to the main email address that I am concerned about. I'm guessing voice mails, missed calls, password changes. But those can all go into a dump mailbox because who cares that a missed call to an empty conference room was missed. The Notifications that you mentioned can be anything, no problem with duplicates there.

@jenn-community-moderator