Depending on the permissions you have, the recipient(s) will see one of the following formats when receiving the message:
- Log into Microsoft 365 via Outlook on the web.
- Click New email button within the ribbon. A new message windows will appear in the reading pane.
- If "From" box option is not visible, click on the "Options" menu and place a check mark within "Show From" box.
- Click on "From" field.
- If the address you want to send as is listed within the drop down menu, select it. Otherwise, select "Other Email Address..." and paste the address of the account you want to 'send as' or 'send on behalf' of.
- Enter the desired values within all the other fields and send the email.
If you do not have the proper permissions, you will receive an email saying Your message did not reach some or all of the intended recipients, followed by the subject, date and time the message was sent and a list of recipients. If you believe you should have sending permissions, contact the owner of the account or your support staff.
New Outlook
- Start Outlook.
- Click New email button within the ribbon. A new message windows will appear in the reading pane.
- If "From" box option is not visible, click on the "Options" menu and place a check mark within "Show From" box.
- Click on "From" field.
- If the address you want to send as is listed within the drop down menu, select it. Otherwise, select "Other Email Address..." and paste the address of the account you want to 'send as' or 'send on behalf' of.
- Enter the desired values within all the other fields and send the email.
Classic Outlook
Important: In order to send-as or send on behalf of an account via classic Outlook desktop client, the account must be visible in the Global Address List (GAL). You can verify the visibility of the account using these instructions: Microsoft 365 - Show or Hide Service Account within Global Address List. If the account is hidden, you must make it visible. Office 365 service accounts are hidden by default within GAL.
- Start Outlook.
- Click New email button within the ribbon. A new message windows will appear in the reading pane.
- If "From" box option is not visible, click on the "Options" menu and place a check mark within "Show From" box.
- Click on "From" field.
- If the address you want to send as is listed within the drop down menu, select it. Otherwise, select "Other Email Address..." and paste the address of the account you want to 'send as' or 'send on behalf' of.
- Enter the desired values within all the other fields and send the email.
If you do not have the proper permissions, you will receive an email saying Your message did not reach some or all of the intended recipients, followed by the subject, date and time the message was sent and a list of recipients. If you believe you should have sending permissions, contact the owner of the account or your support staff.