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How to Set an Automatic Reply for a Mail-Enabled Security Group in Microsoft 365

Chanuka GeekiyanageChanuka Geekiyanage Oct 7, 2026 869 views

Question details

The user wants to configure an automatic reply message for a mail-enabled security group in Microsoft 365.

How to Set an Automatic Reply for a Mail-Enabled Security Group
Product
Microsoft 365
Device & OS
not provided
Scenario
Setting up auto-responders for emails sent to a specific security group.
Observed behavior
The user needs the steps to set up the automatic reply, and guidance on what to do if the 'Reply with' option is unavailable in the admin center.
Before you start

Ensure you have Exchange Administrator or Global Administrator privileges in Microsoft 365 before attempting to modify group email settings.

Solution 1Recommended

Configure Automatic Replies via Microsoft 365 Admin Center

Use the official admin center interface to locate your security group and enable automatic replies.

The standard method for configuring out-of-office or automatic replies for groups is through the Microsoft 365 admin center. Note that Exchange mail flow rules do not typically provide a direct 'Reply with' action for this group type.

1
Log in to the Admin Center

Navigate to the Microsoft 365 admin center and expand the left-hand menu to find the 'Groups' section.

2
Select the Security Group

Click on 'Active groups', locate the specific mail-enabled security group you want to configure, and select it to open its properties panel.

3
Access Email Settings

In the group's properties panel, navigate to the 'Email settings' or 'Settings' tab depending on your admin center layout.

4
Enable Automatic Replies

Select the 'Automatic replies' option, enter your desired response message, and click 'Save' to apply the changes.

Configure Automatic Replies via Microsoft 365 Admin Center
Missing Option Troubleshooting: If the 'Automatic replies' option is missing, try accessing the admin center using a different web browser or incognito mode. Additionally, verify that your specific group type configuration fully supports this feature.
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Frequently Asked Questions

Can I use mail flow rules to set up automatic replies for mail-enabled security groups?

Exchange mail flow rules typically do not provide a direct 'Reply with' action for mail-enabled security groups. It is recommended to use the standard Automatic replies feature within the group settings instead.

Why is the Automatic replies option missing for my security group?

The option might be missing due to browser cache issues, insufficient admin permissions, or because the specific configuration of your group does not support automatic replies. Try using a different browser or checking your Exchange admin roles.

Do automatic replies work for external senders mailing the security group?

Yes, provided that your Microsoft 365 organization settings allow automatic replies to external senders. You may need to configure the group to accept external emails and ensure external auto-replies are permitted globally.