Office 365 - Only allow Group Members to send message to a Group

By default, when a Microsoft Group is created, anyone with a UW-Madison Office 365 account can send a message/email to the Group. If you want to only allow Group members to send messages/emails to the Group, use the steps below to make this request.

Note: You must be the Group owner to make this request.

  •  Only allow Members of the Group to send messages to the Group
      1. If the Group already exists, continue to the next step, otherwise create a Group.
      2. Email Office 365 Document and Support Team the following group information:

        Email address (

      Important: You will receive a confirmation email after the group parameter is modified. It may take up to a day for this setting to be enabled.

      If you have a Group that is already set this way and want to change it back, just email our team with the above information.

      If the link above does not open a new mail message on your computer/device, please send an email manually with the following details:
      • To:
      • Subject: Office 365 request - only group members can send to the group (76645)
      • Body: include all the information listed above

See Also:

Keywords:microsoft office365 o365 lists distribution contacts collaboration group members calendar email conversation subscribe outlook create outlook web group guest access external public private hidden global address list gal non-members request Only allow Group Members to send message to a Group   Doc ID:76645
Owner:Ara M.Group:Office 365
Created:2017-09-19 08:25 CDTUpdated:2018-07-10 08:15 CDT
Sites:DoIT Help Desk, DoIT Tech Store, Office 365
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