Another option is to simply ask the original meeting organizer to add whoever you need to the meeting, so they get an invite directly from the organizer instead of a forwarded copy. If it's a virtual meeting (zoom, teams, etc...), a lot of times our users don't even bother forwarding it, they just internally share the URL for the meeting room.
-Jason ________________________________ From: mailop <mailop-boun...@mailop.org> on behalf of Scott Q. via mailop <mailop@mailop.org> Sent: Monday, July 29, 2024 11:39 AM To: Mark Alley <mark.al...@tekmarc.com>; mailop@mailop.org <mailop@mailop.org> Subject: Re: [mailop] Outlook forwarding meeting invite breaks DMARC CAUTION: This email originated from outside the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Thank you. Do you know what advantage this 'expected behavior' has, in order for Outlook to keep on doing it this way ? Scott On Monday, 29/07/2024 at 11:20 Mark Alley via mailop wrote: Outlook has had this problem IIRC since I first started working with DMARC back in ~2017. It's "expected behavior" apparently, since it uses the "Sender" header to notate the forwarder is sending "on behalf of" the Meeting organizer (which obviously doesn't fix the RFC5322.FROM) I've usually advised users to send the invite as an attachment with the "Forward as iCalendar" option on Desktop outlook in their calendar, which avoids the problem. - Mark Alley On 7/29/2024 9:55 AM, Scott Q. via mailop wrote: Anyone else dealing with Outlook not rewriting the header From upon forwarding a meeting invite ? This is obviously wrong and breaks on domains with strict DMARC policy. I only found this thread that's 3 years old talking about it: https://learn.microsoft.com/en-us/answers/questions/335985/issues-forwarding-meetings<https://urldefense.com/v3/__https://learn.microsoft.com/en-us/answers/questions/335985/issues-forwarding-meetings__;!!PZ0xAML5PpHLxYfxmvfEjrhN5g!S_hQ5dZZZ3wVR3Omn_uCDOEm3S4K8G6oJfbMk0ZLr763DiaIcT7Tlr_nK0o9XrejZSSirZ8vMu3WusXXhtkrKw$> What would the recommended behavior be ? Not forward invites ? Switch MUA ? Scott _______________________________________________ mailop mailing list mailop@mailop.org<mailto:mailop@mailop.org> https://list.mailop.org/listinfo/mailop<https://urldefense.com/v3/__https://list.mailop.org/listinfo/mailop__;!!PZ0xAML5PpHLxYfxmvfEjrhN5g!S_hQ5dZZZ3wVR3Omn_uCDOEm3S4K8G6oJfbMk0ZLr763DiaIcT7Tlr_nK0o9XrejZSSirZ8vMu3WusUEM1_r5A$> ****************************************************************************************************** This communication, including attachments, is for the exclusive use of addressee and may contain proprietary, confidential and/or privileged information. If you are not the intended recipient, any use, copying, disclosure, dissemination or distribution is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return e-mail, delete this communication and destroy all copies. ******************************************************************************************************
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