Send emails as or on behalf of a shared or group mailbox

When composing an email in Outlook desktop or OWA, click the From field to expand a drop-down list. Select the desired mailbox if it is already on the list.

If your mailbox is not on the list, click Other Email Address and type the email address of the mailbox. In your Outlook desktop app, you can also click From to open the Global Address List from where you can select your shared or group mailbox. Click OK to confim and close.

If the From field is not displayed in the email compose window:

1. In Outlook desktop, go to the Options tab and click the From button on the ribbon
   
2. In Outlook on the web (OWA), click the ellipsis (three dots) button at the top of the email compose window and choose Show From 
   

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