Office 365 : Allow Email forwarding to remote domain
To setup Email forwarding to remote domain.
In the Microsoft 365 Defender portal at security.microsoft.com, go to Email & Collaboration > Policies & Rules > Threat policies > Anti-spam in the Policies section. Or, to go directly to the Anti-spam policies page, use security.microsoft.com/antispam.
Regards,
Kon Belieu
Partner
4440 Lake Forest Dr., Suite 102B, Cincinnati, OH 45242