Out Of Office Default Sender Address

Hi evfdcs,

thanks for the update and your question regarding the step 3.

To double-check and configure the Out of Office (OOF) settings in Exchange Online (Office 365) and ensure that the external auto-reply is configured correctly, please follow these steps:

1. Sign in to your Office 365 account using your administrator credentials.
2. Open the Exchange Admin Center (EAC). You can access it through the Admin app launcher or by navigating to the URL: https://admin.exchange.microsoft.com.
3. In the EAC, go to the "Mail flow" section, and then click on "Remote domains."
4. Make sure you have a remote domain entry for external recipients. If not, you may need to create one.
5. Select the remote domain entry for external recipients and modify the settings.
6. In the "Edit remote domain" dialog, ensure that the "Allow automatic replies" option is checked/enabled.
7. Verify that the "Allow automatic forwarding" option is also enabled if you want to forward emails externally.
8. Save the changes.
   
   

   The settings on the screenshot are for internal OOF autoreply, yours should be set up for external.
   
   After that you can double-check the settings in Microsoft 365 Admin Center:

   1. Sign in to your Microsoft 365 admin account using your administrator credentials.
   2. Go to the Microsoft 365 admin center by navigating to the URL: https://admin.microsoft.com.
   3. In the admin center, select "Users" from the left-hand menu.
   4. Click on "Active users" to view a list of active user accounts.
   5. Locate and select the user account for which you want to configure the OOF settings.
   6. In the user's details pane, click on "Mail settings."
   7. Under "Automatic replies," click on "Edit."
   8. Set the desired message and date range for the OOF response.
   9. Make sure the option to send automatic replies to external senders is selected.
   10. Save the changes.
   
   Kindest regards
   
   Leon