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In Microsoft 365 Exchange, distribution lists forward emails to members but don’t store them. To maintain a backup of all emails sent to a list (e.g., [email protected]), follow this strategy:
- Create a Shared Mailbox (e.g., [email protected]) – No license required.
- Add the Shared Mailbox to the Distribution List – Ensures all emails are archived.
- Use Mail Flow Rules (Optional) – Redirect emails to the backup mailbox automatically.
You Should Know:
PowerShell Commands for Automation
Create a shared mailbox New-Mailbox -Name "BK Comercial" -Shared -DisplayName "BK Comercial" Add it to the distribution list Add-DistributionGroupMember -Identity "Comercial_Team" -Member "[email protected]" Verify membership Get-DistributionGroupMember -Identity "Comercial_Team"
Linux Alternative (for Hybrid Environments)
Use curl to interact with Microsoft Graph API:
Get distribution group members (requires Azure AD token)
curl -X GET "https://graph.microsoft.com/v1.0/groups/{group-id}/members" -H "Authorization: Bearer $token"
Add shared mailbox (replace placeholders)
curl -X POST "https://graph.microsoft.com/v1.0/groups/{group-id}/members/$ref" -H "Authorization: Bearer $token" -H "Content-Type: application/json" -d '{"@odata.id":"https://graph.microsoft.com/v1.0/users/{shared-mailbox-id}"}'
Windows CMD (Legacy Exchange)
:: Export distribution list members csvde -f members.csv -d "CN=Comercial_Team,OU=Groups,DC=company,DC=com" -l "member"
What Undercode Say
This method ensures compliance and audit readiness without extra costs. For critical departments (e.g., Legal, Finance), combine this with:
– Journaling Rules (via Exchange Admin Center)
– Retention Policies (Microsoft Purview)
– Automated Logging (Azure Logic Apps)
Expected Output: A tamper-proof email archive accessible via Outlook or PowerShell.
Relevant URLs:
References:
Reported By: Wanderson Silva – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
