If users in an organization aren't receiving multi-factor authentication (MFA) code emails from msonlineservicesteam@microsoftonline.com, it's likely due to email delivery issues such as spam filtering, blocking, or other email security settings.
Here’s what a user should tell their IT department to check and do:
Suggested Message to IT Department:
We're not receiving MFA code emails from Microsoft, specifically from this address: msonlineservicesteam@microsoftonline.com.
Can you please:
- Check spam/junk filters and quarantine: Ensure the emails aren't being flagged or quarantined by our spam filters or email security tools.
- Whitelist the sender/domain:
- Whitelist msonlineservicesteam@microsoftonline.com
- Also consider whitelisting @microsoftonline.com or *.microsoftonline.com if allowed by policy.
- Check any third-party email security services we use (like Mimecast, Proofpoint, Barracuda, etc.) to make sure they're not blocking or delaying these messages.
- Check mail flow/transport rules in Exchange Admin Center or Microsoft 365 Defender (if applicable) for any rules that could affect these emails.
- Monitor email logs to see if these emails are being received, deferred, or rejected.
These are critical for ACGME platform authentication, so resolving this is urgent.