Office 365 Outlook email issue
Microsoft put out a message that email forwarding to external domains will be turned off by default. The email forward will get a bounceback of:
“Remote Server returned ‘550 5.7.520 Access denied, Your organization does not allow external forwarding.”
Office 365 now blocks all auto-forwarding by default or they have set their own custom blocking.
https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/external-email-forwarding?view=o365-worldwide
If you would like email forwarding enable for your organisation you can edit the policy show here:
https://protection.office.com/antispam
Open Threat Management and select Policy
Open Anti-Spam then select Edit Policy
Select Automatic Forwarding drop down menu and select On – Forwarding is enabled
Allow a few hours for policy to populate.