I created a new user on our local AD (SBS 2008) and set a proxy address to include "SMTP:name@domain.com". When it synced to O365 (we have Microsoft Azure Active Directory Sync running on one of the servers), it set the default email as "name@domain.onmicrosoft.com" instead. We have Okta set up as a SSO solution, but I'm not sure if that is interfering in this.
I can't change the default reply in the O365 admin GUI since it is a synced account, but the info is right in our local AD. What's my next step?