- Open Thunderbird. Under Set up an account select Email.

- Enter Your name, Email address and Password.

- Select Continue.

- Select IMAP (remote folders) and Done. (Or, you can configure your email using POP3.)

Troubleshooting
If Thunderbird can’t find your email account, select Manual config. Review your server and port settings:
Incoming settings
Server name:
outlook.office365.com (POP/IMAP)
Port:
POP: 995 with SSL selected
IMAP: 993 with SSL selected
Encryption method:
TLS (POP/IMAP)
Outgoing settings
Server name:
smtp.office365.com
Port:
587
Encryption method:
STARTTLS
