1. Is there any way to set up Microsoft Team "Channel" email addresses to use *@contoso.com instead of firstname.lastname@example.org.
2. We are experiencing ALOT of emails getting caught as phishing (AntiPhishPolicy) or SPAM from the @amer.teams.ms and email@example.com sender addresses for some reason in EOP/EOL and security is not wanting to whitelist those domains.
Any suggestions or either or both Team? Thanks for your time.
No. As explained in the documentation/blog articles, Teams uses a special tenant for handling the email to channel functionality, and we have no control over it. You can however create a mail contact for the generated address and assign it a firstname.lastname@example.org alias.