Exclude shared mailboxes from Dynamic Distribution Group

This shows you how to exclude shared mailboxes from a Dynamic Distribution Group in Exchange Online. We will be using Powershell to make sure your shared mailboxes don’t get spam in them.

Exclude Shared Mailboxes

Commands

Connect to O365 in PS:

$UserCredential = Get-Credential
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection
Import-PSSession $Session

Exclude Shared Mailboxes with this filter command:

set-DynamicDistributionGroup -Name "all@yourcompany.com" -RecipientFilter {((RecipientType -eq 'UserMailbox') -and -not (RecipientTypeDetailsValue -eq 'SharedMailbox'))}

Conclusion

Afterward, Verify in Exchange Admin Console. You always want to prevent your shared mailboxes from getting spammed in a distribution group. Consequently, I’d highly recommend setting a requirement to send to-these dynamic mailboxes. This will prevent every employee from sending emails to everyone, which will be a bad thing.

Chris Titus Tech

Twitter - https://twitter.com/christitustech
YouTube - https://youtube.com/c/ChrisTitusTech
Twitch - https://twitch.tv/christitustech
Odysee / LBRY (Privacy) - https://links.christitus.com/lbry

Exclusive Content

ChrisTitus.com Members Section (CC Only)
- Digital Downloads with Guides and Pre-Built Images
- Monthly Members Only Video
- $5 Per Month (100% of Proceeds goes to Chris Titus Tech)
YouTube Chris Titus Tech Membership (All Payments Accepted)
- Monthly Members Only Video
- YouTube Emojis for Comments and Live Chat
- YouTube Badges that changes based on membership time for comments and chat.
- All YouTube comments are highlighted when I review comments daily.
- $4.99 Per Month (70% of the Proceeds goes to Chris Titus Tech)