@dustinb3403 The default account was it. It didn't sync the ones he created before the switch, so he had to re-create them. Thanks!

@dustinb3403 Went to contact settings and changed Default account to the correct account now. Seeing if that will issue a good sync here soon.

@dustinb3403 He's using just the regular mail app. Under accounts & Passwords he said the account he is using the Contacts is enabled. When making a change to a contact it's updating it in 365, but when creating a new contact, it's not showing up.