Please note that setting up a Hosted Exchange mailbox in Thunderbird is only possible via IMAP. Calendar and contact synchronization is therefore disabled.
We recommend using Outlook (Classic) as an alternative.
1 - Open Thunderbird
Launch the Thunderbird application.
2 - Enter email address and password
Enter the email address/username and password of your Direct Setup Exchange mailbox and click "Configure manually".
3 - Server Settings
Please complete/change the information entered. The following information is required to set up your Hosted Exchange Direct-Setup mailbox via IMAP in Thunderbird:
Protocol: IMAP
IMAP incoming server / Hostname: at.exchangeserver.online
Port: 993
Connection security: SSL/TLS
Authentication method: Normal password
Username: Your email-address
SMTP outgoing server / Hostname: at.exchangeserver.online
Port: 587
Connection security: STARTTLS
Authentication method: Normal password
Username: Your email address
Next, click "Done".
4 - Completion
Wait until Thunderbird has set up your mailbox.
You can now access your emails.
