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Microsoft 365 groups external guests -DMARC fail
We have external members in a M365 group. 1. ExternalMember1 sends an email to the group. ExternalMember1's domain has strict DMARC policies in place. 2. M365 delivers the message to ExternalMember...
- Answering to myself as I've been investigating this matter with Microsoft.
Update 9 June 2021:
Strong DMARC policy cannot be bypassed, i.e., in our scenario a Microsoft 365 group cannot be used to successfully distribute email to all recipients. The suggested workaround is to add the problematic recipients as CC (manually).
Microsoft has no ETA of resolving this limitation (I don't know if it's even possible) and as stronger DMARC rules are being recommended and honored across the web, it seems that using M365 groups + email + external guests is getting tricky.
Answering to myself as I've been investigating this matter with Microsoft.
Update 9 June 2021:
Strong DMARC policy cannot be bypassed, i.e., in our scenario a Microsoft 365 group cannot be used to successfully distribute email to all recipients. The suggested workaround is to add the problematic recipients as CC (manually).
Microsoft has no ETA of resolving this limitation (I don't know if it's even possible) and as stronger DMARC rules are being recommended and honored across the web, it seems that using M365 groups + email + external guests is getting tricky.
Update 9 June 2021:
Strong DMARC policy cannot be bypassed, i.e., in our scenario a Microsoft 365 group cannot be used to successfully distribute email to all recipients. The suggested workaround is to add the problematic recipients as CC (manually).
Microsoft has no ETA of resolving this limitation (I don't know if it's even possible) and as stronger DMARC rules are being recommended and honored across the web, it seems that using M365 groups + email + external guests is getting tricky.