How to enable ‘Out of Office’ in a Office 365 Distribution Group

Step-by-step guide

1. 1. Connect to Exchange Online with Windows PowerShell.
   2. Run the cmdlet:
   Set-DistributionGroup -Identity  -SendOofMessageToOriginatorEnabled $trueNotice
2. If it is a DDG, please use this command:
   Set-DynamicDistributionGroup -Identity -SendOofMessageToOriginatorEnabled $true
3. Configure a user’s mailbox (which is a member of the DG) in your Outlook and set the OOOM.
4. Send a test message to the DG to confirm.
5. In case that Office 365 is syncing with on premises Active Directory then login on clients AD
6. Locate the Distribution Group -> Properties -> Attribute Editor (Enable Advanced attributes first)
7. Locate the filed ‘oOFReplyToOriginator‘ and set it to ‘TRUE‘
8. Open Powershell and Sync with Office 365 :
9. Import-Module DirSync
10. Start-OnlineCoexistenceSync
11. Configure a user’s mailbox (which is a member of the DG) on your Outlook and set the OOOM.
12. Send a test message to the DG to confirm