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Microsoft 365 — Sending from Shared Mailboxes

Microsoft Outlook using Microsoft Exchange or Microsoft 365 can support multiple mailboxes but by default will send from the user's primary mailbox.

To send a message from a shared mailbox:

  1. Start a new message.

  2. If you don't see the From line:

    …choose OptionsShow From.

  3. Click From. Enter the address you wish to send from.

    If the address does not appear, click Other Email Address from the drop-down list and click From to select from the Global Address List:

    This only needs to be done once. In future the shared mailbox can be selected more easily using the From button drop-down list.

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