Dear Todd B B,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
Based on your description, I understand that you have a query "How to Switch "From" Email Address in Outlook WITHOUT Opening a New Message Window?"
To switch the "From" email address in Outlook without opening a new message window, you can follow these steps:
- Click on the "Options" tab in the ribbon at the top of the Outlook window.
- Click on the "Show From" button in the "Show Fields" section.
- A "From" field will appear above the "To" field in the message window. Click on the "From" field.
- Select the email address you want to use from the drop-down list.
- The "From" email address will now be changed in the email you are working on.
I tested this on my end, and I can switch "From" Email Address in new Outlook freely. If the issue persists after trying this, please try remove the account and readd it or try repairing your outlook.
If none of these steps resolve the issue, please let me know and provide details like version of Outlookso we can explore other options. Please understand that our initial response may not always resolve the issue right away. However, with your help and more detailed information, we can work together to find a solution. Thank you for your help.