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Summary
This article describes how to send as a Proxy Address in Microsoft 365. A Proxy Address is an additional email address for a Primary Mailbox. Historically, proxy addresses could not send mail, however, this feature allows users to do so. A good example of this is how in our consolidated Microsoft 365 environment, you may have affiliations with more than one system campus. Now, you are able to send to either address, not just your primary.
How-To
Task: To select the proxy addresses displayed in the From drop-down menu.
Instructions
Step 1 - Sign in to Portal.Office.Com
Step 2 - Select the Waffle icon 
> Outlook.
Step 3 - Select Settings 
> View all Outlook settings > Mail > Compose and reply.
Step 4 - In the Addresses to send from section, select the proxy addresses to include from the drop-down menu.
Note: The proxy addresses shown are controlled by your affiliation with the University System of New Hampshire. If there are questions on why you do or do not have a specific address, contact your HR department (Employees) or University Registrar's Office (Students).
Step 5 - Click Save.
Outcome
The From drop-down menu is populated with the proxy addresses that are selected.
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Task: To display the From drop-down menu and send a message using a proxy address.
Instructions
Step 1 - Sign in to Portal.Office.Com
Step 2 - Select the Waffle icon > Outlook.
Step 3 - Click New Message.
Step 4 - Click the ellipse (...) located at the right corner of the top pane.
Step 5 - Select Show From to add the From drop-down menu to your message.
Step 6 - Click From to expand the drop-down list.
Step 7 - Select a proxy address.
Step 8 - Complete and send the email message.
Outcome
The selected proxy address displays as the sender of the message in the recipient's mail box.
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Need additional help?
For assistance concerning site creation, content sharing, file synchronization, or other common SharePoint, OneDrive, Teams, or Office app activities, we recommend our Microsoft 365 Learning sites:
Learn more about the great tools our Microsoft 365 Learning sites offer!
Visit the Technology Help Desk Support page to locate your local campus contact information or to submit an online technology support request. For password issues you must call or visit the Help Desk in person.