The following instructions assume that you already have an email alias, manage an Exchange group account, or have permission to send email on behalf of another individual.

Outlook on the Web

First Choose Which Email Addresses Appear in your Client

1. Open Outlook on the web and select Settings. (Look for the gear icon at the top right.)
2. Select Mail.
3. Select Compose and reply.
4. Find Addresses to send from and select the aliases you want available in the From list.
5. Close Settings. 

Send a New Message From a Different Email

1. Select New mail. The From line will appear next to the Send icon and will show your default email address.

2. Select From and choose the email address you want to use. If necessary, choose Other email address and enter the alias exactly.
3. Compose the message, verify the From address, and select Send.

Replies and Forwarding

Before sending a reply or forward, inspect the From field. Client behavior can vary, and the selected sender may be your primary address rather than the alias that originally received the message.

New Outlook for Windows

1. Create a new message.

2. Select From. Choose the alias if it is listed, or choose Other email address and enter the alias.
3. Verify the displayed sender address and send the message.

Classic Outlook for Windows

1. Create a new email message.

2. Select From, and then select Other E-mail Address.
3. Enter your assigned alias and select it as the sender.
4. Verify the From field and send the message.