Need help setting this up?
If you'd rather not deal with the technical side, we can fully set up and manage your Microsoft 365 for you — including email, DNS, and ongoing support.
1. Open Mozilla Thunderbird.
2. Click on the email you wish to open twice.
3. In the top area on right side, click on the "Reply" button.

4. Type your message in a message box and click "Send".
Related Guides
- Basic mailbox settings for Outlook and other email clients (POP/IMAP)
- Diagnostics log collection in Support and Recovery Assistant
- Add an Outlook.com or Office 365 account
- How to Create Email Account in the Control Panel
- Groups naming policy
Prefer us to handle this?
We provide fully managed Microsoft 365 setup and support — so you can focus on running your business.
